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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role The hardware we need to accomplish our mission does not exist, so we must make it ourselves. As a mechanical engineer spearheading our mechanical design efforts, you'll be tasked with designing everything from heat exchangers to clinical grade perfusion devices. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a Senior Scientist, Cardiac Preservation to lead our heart preservation efforts within the whole organ preservation team. You will own a large domain and play a vital role in shaping how Until preserves, recovers, and assesses the viability of the heart through cryopreservation. Drawing on deep expertise in cardiac physiology and ex vivo heart perfusion, you will design and execute the experiments that make reversible cryopreservation of the heart a reality. You will collaborate with scientists and engineers across the company on approaches grounded in the first principles of biology, physics, and chemistry. Creative and highly independent scientific engagement is a requirement of the role, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a \"pause button\" for biology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role: We are seeking an experienced and highly motivated Surgery Technician to join our whole organ preservation team full-time. In this role, you will play a central hands-on role in advancing our perfusion, preservation, and experimental surgical workflows. The primary focus of this position is supporting and executing complex pre-clinical surgical procedures and ex vivo perfusion experiments, with particular emphasis on tissue preparation, cannulation, surgical troubleshooting, and protocol execution. This role is critical to maintaining experimental quality, reproducibility, and operational throughput across our research program. You will work closely with scientists and engineers developing next-generation cryopreservation systems and will help translate experimental concepts into reliable surgical and perfusion procedures. We are looking for someone who is highly organized, technically rigorous, calm under pressure, and excited to contribute directly to solving one of the hardest problems in biotechnology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We are seeking an experienced and dedicated full-time Research Associate to join our whole organ preservation team. As Research Associate, you will play a vital role in the scientific progress of our research program. The primary focus of this role is on developing organ perfusion protocols, with an emphasis on organ isolation, preservation, and viability evaluation. The person in this role is encouraged to take on significant ownership of specific technical challenges. You will have the opportunity to collaborate with scientists and engineers across the company on variety of methods inspired by first principles of biology, physics, and chemistry. Creative scientific engagement is encouraged, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a “pause button” for biology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're hiring an experienced, full-time Research Associate to support nanomaterials synthesis, characterization, and implementation. You will work directly with our scientific team to create novel materials, ensure their reproducible synthesis and characterization, and help scale to a manufacturable product. About the Company: Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a highly skilled ECMO Perfusionist to support preclinical rodent studies involving extracorporeal membrane oxygenation (ECMO) and cardiopulmonary bypass systems. Our studies involve transitioning animals from normothermic blood perfusion to hypothermic, non-blood perfusion with cryoprotectant solutions, followed by controlled rewarming and reperfusion with blood. Each phase presents distinct physiological and biochemical challenges that can impact organ viability and whole-body recovery. This position extends beyond traditional ECMO management and requires deep physiological insight, strong troubleshooting skills, and protocol optimization experience. The perfusionist will be responsible for identifying key failure points, diagnosing mechanisms of injury, and proposing meaningful protocol modifications to improve recovery outcomes. About Until Until is a moonshot company building a “pause button” for biology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a Scientist/Senior Scientist, Translational Cardiac Biology to join our team. You will be part of a multidisciplinary team that designs, builds, and characterizes new technologies that form the foundation of organ-scale reversible cryopreservation. In this role, you will advance cryopreservation formulations by designing, executing, and analyzing high throughput experiments focused on cardiac biology and toxicology. You will establish novel approaches to characterize toxicity and permeability of new cryoprotectant solutions using cardiac cells (hiPSC-CMs, immortalized cells) and advanced 3D in vitro cardiac models. Your work will pioneer the use of predictive 2D and 3D models for toxicity assessment, helping enable human-sized organ preservation and bridging patients to future cures. Until is a moonshot company building a “pause button” for biology. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We're looking for a highly reliable, detail-oriented university intern to support both business operations and lab operations through a rotational role. This is a paid, hands-on position for someone who enjoys being in the middle of things - helping systems run smoothly, learning how a fast-moving biotech operates, and executing on real operational work. This role is ideal for a student interested in biotech, operations, lab environments, or startups who wants exposure to both the scientific and business sides of an early-stage company. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Role Description We are seeking a Senior Lab Operations Lead to own the day-to-day management and scaling of Until Labs' research facilities. This role is responsible for ensuring that a large, technically complex laboratory environment operates with high reliability, safety, and throughput. As Until Labs grows, this role will also play a key role in operationalizing expanded lab facilities, including helping stand up and scale into a new space, ensuring continuity of research and readiness for large-animal and GLP-adjacent work. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Role Overview This is a senior leadership role responsible for shaping Until's legal, IP, and risk posture as the company moves toward the clinic. The Head of Legal will act as a strategic partner to the executive team, influencing core technical, commercial, and regulatory decisions. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As an integration engineer at Until, you'll be working across teams to deliver next-gen perfusion, cooling, and rewarming systems. Successfully owning the deployment of these systems will require you to autonomously work across hardware/software stacks and work closely with scientists across the company. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We are also building out our medical hibernation team to tackle the challenges of whole-body cryopreservation, beginning with rodent models. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As a Machine Learning Engineer / Scientist at Until, you will be an early member of the computational team defining how experimental data becomes insight and drives the next round of scientific discovery. You'll build high-leverage ML systems that help develop new cryoprotectant formulations, engineer biologically-inspired antifreeze proteins, and understand the physics of vitrification and rewarming. You will own projects end-to-end including shaping data collection and designing data pipelines, training and evaluating models, and deploying tooling that scientists use daily. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As an engineer on the hibernation team, you'll be building N-of-1 hardware and software stacks to cryopreserve whole organisms. This requires the ability to own mechanical design and fabrication, electrical design and bringup, and software architecture and development. If successful, you will be the principal engineer to demonstrate the feasibility of whole body reversible cryopreservation in rodents. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this time-critical challenge, we're laying the foundation for medical hibernation: pausing molecular motion to give patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, controlled-rate freezers, and vitrification and rewarming protocols for human tissue. We are also building out our medical hibernation team to tackle the challenges of whole-body cryopreservation, beginning with rodent models. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As a Software Engineer at Until, you'll build the computational and infrastructure backbone that enables our science to move faster. You'll design and implement data pipelines, lab automation interfaces, and cloud-based systems that scale with our experiments. You will own projects end-to-end, collaborate across disciplines, and set a high bar for developing code that scales with the team. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role Accomplishing our mission requires skilled engineers pushing the boundary developing new systems for heat and mass transfer in N-of-1 perfusion and heat exchange devices. We're building a fast-paced, scrappy team of engineers to create technology indistinguishable from magic. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to", "parental_leave_weeks": null, "non_birth_parent_leave_weeks": null, "parental_leave_weeks_source": null, "non_birth_parent_leave_weeks_source": null, "parental_leave_source_url": null, "pto_days": null, "unlimited_pto": false, "sabbatical_eligible": false, "family_friendly_score": 43, "benefit_verified": false, "benefit_last_verified": null, "hire_states_allowed": [], "state_eligibility_source": null, "state_eligibility_enriched_at": null, "llm_quality_pass_at": null, "seniority": "senior", "years_experience_min": 3, "years_experience_max": 7, "role_function": "data", "employer_industry": null, "employer_size": "51-200", "quality_score": 45, "travel_pct": null, "requires_shift": null, "shift_type": "unknown", "shift_type_source": null, "weekend_work": "unknown", "weekend_work_source": null, "relocation_assistance_source": null, "contractor_w2": "unknown", "required_timezone": null, "fertility_family_building_benefits_source": null, "mental_health_support_source": null, "adoption_assistance_offered_source": null, "childcare_subsidy_source": null, "learning_budget_offered_source": null, "surrogacy_assistance_offered_source": null, "cover_letter_required": null, "cover_letter_required_source": null, "assessment_required": null, "assessment_required_source": null, "application_deadline": null, "application_deadline_source": null, "visa_sponsorship": false, "us_citizenship_required": false, "security_clearance": "none", "education_required": "none", "roll_up_count": null, "roll_up_total_locations": null, "explanations": [] }, { "id": "e77d8f0f8fe86f771198cea096f2ed61", "title": "Mechanical Engineer, Fluidics/Perfusion", "employer_name": "Until", "employer_slug": "until", "location_text": "Bay Area", "country": "US", "employment_type": "unknown", "remote_status": "unspecified", "remote_status_source": null, "remote_status_enriched_at": null, "days_in_office": null, "timezone_overlap_hours": 6, "salary_min": null, "salary_max": null, "salary_min_source": null, "salary_max_source": null, "salary_currency": "USD", "salary_type": "unknown", "salary_type_source": null, "salary_type_enriched_at": null, "salary_period": null, "base_salary_min": null, "base_salary_max": null, "salary_disclosed": false, "equity_included": true, "equity_included_source": null, "equity_type": [ "options" ], "k401_match": null, "match_401k_pct": null, "match_401k_pct_source": null, "k401_match_source_url": null, "k401_match_source_fields": [], "k401_contribution_source_url": null, "k401_contribution_source_fields": [], "profit_sharing": false, "bonus_offered": false, "mental_health_support": null, "childcare_subsidy": null, "fertility_family_building_benefits": null, "adoption_assistance_offered": null, "surrogacy_assistance_offered": null, "learning_budget_offered": null, "relocation_assistance": null, "top_startup_sources": [ "foundersfund" ], "posted_at": "2025-08-13T05:33:44.209Z", "apply_url": "https://jobs.lever.co/until/261733ff-53a5-4250-8e8d-3eeef5167f06", "apply_url_verified": false, "ats": "lever", "url_last_checked_alive": null, "removed_at": null, "description_excerpt": "Mechanical Engineer, Fluidics/Perfusion Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About You - Track record of exceptional engineering abilities - Deep understanding of heat and mass transfer principles - Experience designing fluidic systems for perfusion/heat exchangers - High degree of autonomy across full engineering stack: electromechanical design and fabrication, control software,", "parental_leave_weeks": null, "non_birth_parent_leave_weeks": null, "parental_leave_weeks_source": null, "non_birth_parent_leave_weeks_source": null, "parental_leave_source_url": null, "pto_days": null, "unlimited_pto": false, "sabbatical_eligible": false, "family_friendly_score": 43, "benefit_verified": false, "benefit_last_verified": null, "hire_states_allowed": [], "state_eligibility_source": null, "state_eligibility_enriched_at": null, "llm_quality_pass_at": null, "seniority": "mid", "years_experience_min": 3, "years_experience_max": 7, "role_function": "data", "employer_industry": null, "employer_size": "51-200", "quality_score": 45, "travel_pct": null, "requires_shift": null, "shift_type": "unknown", "shift_type_source": null, "weekend_work": "unknown", "weekend_work_source": null, "relocation_assistance_source": null, "contractor_w2": "unknown", "required_timezone": null, "fertility_family_building_benefits_source": null, "mental_health_support_source": null, "adoption_assistance_offered_source": null, "childcare_subsidy_source": null, "learning_budget_offered_source": null, "surrogacy_assistance_offered_source": null, "cover_letter_required": null, "cover_letter_required_source": null, "assessment_required": null, "assessment_required_source": null, "application_deadline": null, "application_deadline_source": null, "visa_sponsorship": false, "us_citizenship_required": false, "security_clearance": "none", "education_required": "none", "roll_up_count": null, "roll_up_total_locations": null, "explanations": [] }, { "id": "8e8982edc84b19a56998e84a76a558ce", "title": "Scientist (Organ Perfusion)", "employer_name": "Until", "employer_slug": "until", "location_text": "Bay Area", "country": "US", "employment_type": "unknown", "remote_status": "unspecified", "remote_status_source": null, "remote_status_enriched_at": null, "days_in_office": null, "timezone_overlap_hours": 6, "salary_min": null, "salary_max": null, "salary_min_source": null, "salary_max_source": null, "salary_currency": "USD", "salary_type": "unknown", "salary_type_source": null, "salary_type_enriched_at": null, "salary_period": null, "base_salary_min": null, "base_salary_max": null, "salary_disclosed": false, "equity_included": true, "equity_included_source": null, "equity_type": [ "options" ], "k401_match": null, "match_401k_pct": null, "match_401k_pct_source": null, "k401_match_source_url": null, "k401_match_source_fields": [], "k401_contribution_source_url": null, "k401_contribution_source_fields": [], "profit_sharing": false, "bonus_offered": false, "mental_health_support": null, "childcare_subsidy": null, "fertility_family_building_benefits": null, "adoption_assistance_offered": null, "surrogacy_assistance_offered": null, "learning_budget_offered": null, "relocation_assistance": null, "top_startup_sources": [ "foundersfund" ], "posted_at": "2025-07-30T05:13:40.167Z", "apply_url": "https://jobs.lever.co/until/2784d9e2-5d0a-4a97-bd65-a1b014c646ec", "apply_url_verified": false, "ats": "lever", "url_last_checked_alive": null, "removed_at": null, "description_excerpt": "Scientist (Organ Perfusion) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We are seeking a Scientist to join our whole organ preservation team. You will apply your experience in perfusion, preservation, viability assessment and your passion for rapid protocol development to make successful large organ cryopreservation a reality. You will have the opportunity to collaborate with scientists and engineers across the company on variety of methods inspired by first principles of biology, physics, and chemistry. Creative scientific engagement is a requirement of the role, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We're building an elite team of applied physicists, engineers, and materials scientists for true full stack engineering, from electrons to operating systems. Projects will require high degree of autonomy and breadth of skill across electrical, mechanical, and materials design, with a strong emphasis on first principles thinking. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. 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Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We're building an elite team of applied physicists and engineers for true full stack engineering, from electrons to operating systems. Projects will require high degree of autonomy and breadth of skill across electrical, mechanical, and computational design, with a strong emphasis on first principles thinking and a desire to make technology indistinguishable from magic. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. 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Mechanical Engineering, Design at Until - Bay Area - Mechanical Engineering, Design Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role The hardware we need to accomplish our mission does not exist, so we must make it ourselves. As a mechanical engineer spearheading our mechanical design efforts, you'll be tasked with designing everything from heat exchangers to clinical grade perfusion devices. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine

", "datePosted": "2026-06-02T16:27:09.917Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "b4d7d878dc89920b1888564819241ad0" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/mechanical-engineering-design-b4d7d878" } }, { "@type": "ListItem", "position": 2, "url": "https://fewerjobs.com/jobs/until/senior-scientist-cardiac-preservation-organ-perfusion-f76180a2", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Senior Scientist, Cardiac Preservation (Organ Perfusion)", "description": "

Senior Scientist, Cardiac Preservation (Organ Perfusion) at Until - Bay Area - Senior Scientist, Cardiac Preservation (Organ Perfusion) Bay Area Until is a moonshot company building a "pause button" for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a Senior Scientist, Cardiac Preservation to lead our heart preservation efforts within the whole organ preservation team. You will own a large domain and play a vital role in shaping how Until preserves, recovers, and assesses the viability of the heart through cryopreservation. Drawing on deep expertise in cardiac physiology and ex vivo heart perfusion, you will design and execute the experiments that make reversible cryopreservation of the heart a reality. You will collaborate with scientists and engineers across the company on approaches grounded in the first principles of biology, physics, and chemistry. Creative and highly independent scientific engagement is a requirement of the role, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a "pause button" for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving

", "datePosted": "2026-05-27T21:59:09.021Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "f76180a288176e831c10838812fb33cf" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 60 }, "educationRequirements": "Doctorate", "url": "https://fewerjobs.com/jobs/until/senior-scientist-cardiac-preservation-organ-perfusion-f76180a2" } }, { "@type": "ListItem", "position": 3, "url": "https://fewerjobs.com/jobs/until/surgery-technician-organ-perfusion-caea9512", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Surgery Technician (Organ Perfusion)", "description": "

Surgery Technician (Organ Perfusion) at Until - Bay Area - Surgery Technician (Organ Perfusion) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role: We are seeking an experienced and highly motivated Surgery Technician to join our whole organ preservation team full-time. In this role, you will play a central hands-on role in advancing our perfusion, preservation, and experimental surgical workflows. The primary focus of this position is supporting and executing complex pre-clinical surgical procedures and ex vivo perfusion experiments, with particular emphasis on tissue preparation, cannulation, surgical troubleshooting, and protocol execution. This role is critical to maintaining experimental quality, reproducibility, and operational throughput across our research program. You will work closely with scientists and engineers developing next-generation cryopreservation systems and will help translate experimental concepts into reliable surgical and perfusion procedures. We are looking for someone who is highly organized, technically rigorous, calm under pressure, and excited to contribute directly to solving one of the hardest problems in biotechnology. This role is

", "datePosted": "2026-05-19T21:20:09.992Z", "employmentType": "FULL_TIME", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "caea951278c1d1eb9f0b34320bd72ace" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 24 }, "educationRequirements": "Bachelors", "url": "https://fewerjobs.com/jobs/until/surgery-technician-organ-perfusion-caea9512" } }, { "@type": "ListItem", "position": 4, "url": "https://fewerjobs.com/jobs/until/research-associate-organ-perfusion-8cb2fdfb", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Research Associate (Organ Perfusion)", "description": "

Research Associate (Organ Perfusion) at Until - Bay Area - Research Associate (Organ Perfusion) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We are seeking an experienced and dedicated full-time Research Associate to join our whole organ preservation team. As Research Associate, you will play a vital role in the scientific progress of our research program. The primary focus of this role is on developing organ perfusion protocols, with an emphasis on organ isolation, preservation, and viability evaluation. The person in this role is encouraged to take on significant ownership of specific technical challenges. You will have the opportunity to collaborate with scientists and engineers across the company on variety of methods inspired by first principles of biology, physics, and chemistry. Creative scientific engagement is encouraged, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without

", "datePosted": "2026-05-19T21:10:19.142Z", "employmentType": "FULL_TIME", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "8cb2fdfb02e6ff7ecd3e523db94295f8" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 24 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/research-associate-organ-perfusion-8cb2fdfb" } }, { "@type": "ListItem", "position": 5, "url": "https://fewerjobs.com/jobs/until/research-assistant-materials-chemistry-nanoparticles-3c7cd318", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Research Assistant, Materials Chemistry (Nanoparticles)", "description": "

Research Assistant, Materials Chemistry (Nanoparticles) at Until - Bay Area - Research Assistant, Materials Chemistry (Nanoparticles) Bay Area About the Company: Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're hiring an experienced, full-time Research Associate to support nanomaterials synthesis, characterization, and implementation. You will work directly with our scientific team to create novel materials, ensure their reproducible synthesis and characterization, and help scale to a manufacturable product. About the Company: Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely

", "datePosted": "2026-04-23T22:28:47.040Z", "employmentType": "FULL_TIME", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "3c7cd318de9636426bdf075087dac3fd" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/research-assistant-materials-chemistry-nanoparticles-3c7cd318" } }, { "@type": "ListItem", "position": 6, "url": "https://fewerjobs.com/jobs/until/biology-biochemistry-intern-spring-summer-2026-11dee01d", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Biology/Biochemistry Intern (Spring/Summer 2026)", "description": "

Biology/Biochemistry Intern (Spring/Summer 2026) at Until - Bay Area - Biology/Biochemistry Intern (Spring/Summer 2026) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more

", "datePosted": "2026-03-07T00:24:53.492Z", "employmentType": "INTERN", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "11dee01d2fbe10c730b9427d09bd6e19" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/biology-biochemistry-intern-spring-summer-2026-11dee01d" } }, { "@type": "ListItem", "position": 7, "url": "https://fewerjobs.com/jobs/until/materials-science-intern-spring-summer-2026-6b89e55b", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Materials Science Intern (Spring/Summer 2026)", "description": "

Materials Science Intern (Spring/Summer 2026) at Until - Bay Area - Materials Science Intern (Spring/Summer 2026) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do

", "datePosted": "2026-03-07T00:22:34.673Z", "employmentType": "INTERN", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "6b89e55becc975ec47d63b13aa413db1" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/materials-science-intern-spring-summer-2026-6b89e55b" } }, { "@type": "ListItem", "position": 8, "url": "https://fewerjobs.com/jobs/until/ecmo-perfusionist-cbe79b70", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "ECMO Perfusionist", "description": "

ECMO Perfusionist at Until - Bay Area - ECMO Perfusionist Bay Area About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a highly skilled ECMO Perfusionist to support preclinical rodent studies involving extracorporeal membrane oxygenation (ECMO) and cardiopulmonary bypass systems. Our studies involve transitioning animals from normothermic blood perfusion to hypothermic, non-blood perfusion with cryoprotectant solutions, followed by controlled rewarming and reperfusion with blood. Each phase presents distinct physiological and biochemical challenges that can impact organ viability and whole-body recovery. This position extends beyond traditional ECMO management and requires deep physiological insight, strong troubleshooting skills, and protocol optimization experience. The perfusionist will be responsible for identifying key failure points, diagnosing mechanisms of injury, and proposing meaningful protocol modifications to improve recovery outcomes. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant.

", "datePosted": "2026-03-02T04:32:00.072Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "cbe79b70862a830f7db0472971eaade3" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/ecmo-perfusionist-cbe79b70" } }, { "@type": "ListItem", "position": 9, "url": "https://fewerjobs.com/jobs/until/scientist-senior-scientist-translational-cardiac-biology-4a1739a6", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Scientist/ Senior Scientist - Translational Cardiac Biology", "description": "

Scientist/ Senior Scientist - Translational Cardiac Biology at Until - Bay Area - Scientist/ Senior Scientist - Translational Cardiac Biology Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We are seeking a Scientist/Senior Scientist, Translational Cardiac Biology to join our team. You will be part of a multidisciplinary team that designs, builds, and characterizes new technologies that form the foundation of organ-scale reversible cryopreservation. In this role, you will advance cryopreservation formulations by designing, executing, and analyzing high throughput experiments focused on cardiac biology and toxicology. You will establish novel approaches to characterize toxicity and permeability of new cryoprotectant solutions using cardiac cells (hiPSC-CMs, immortalized cells) and advanced 3D in vitro cardiac models. Your work will pioneer the use of predictive 2D and 3D models for toxicity assessment, helping enable human-sized organ preservation and bridging patients to future cures. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without

", "datePosted": "2026-02-24T23:32:58.451Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "4a1739a67997b244e2cd2d298c526149" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 60 }, "educationRequirements": "Doctorate", "url": "https://fewerjobs.com/jobs/until/scientist-senior-scientist-translational-cardiac-biology-4a1739a6" } }, { "@type": "ListItem", "position": 10, "url": "https://fewerjobs.com/jobs/until/rotational-business-operations-and-lab-operations-intern-university-ee4d1533", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Rotational Business Operations & Lab Operations Intern (University)", "description": "

Rotational Business Operations & Lab Operations Intern (University) at Until - Bay Area - Rotational Business Operations & Lab Operations Intern (University) Bay Area About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role We're looking for a highly reliable, detail-oriented university intern to support both business operations and lab operations through a rotational role. This is a paid, hands-on position for someone who enjoys being in the middle of things - helping systems run smoothly, learning how a fast-moving biotech operates, and executing on real operational work. This role is ideal for a student interested in biotech, operations, lab environments, or startups who wants exposure to both the scientific and business sides of an early-stage company. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients

", "datePosted": "2026-01-27T01:28:39.154Z", "employmentType": "INTERN", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "ee4d153313f29fef088853aaeb815825" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "educationRequirements": "Masters", "url": "https://fewerjobs.com/jobs/until/rotational-business-operations-and-lab-operations-intern-university-ee4d1533" } }, { "@type": "ListItem", "position": 11, "url": "https://fewerjobs.com/jobs/until/senior-lab-operations-manager-563222bc", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Senior Lab Operations Manager", "description": "

Senior Lab Operations Manager at Until - Bay Area - Senior Lab Operations Manager Bay Area About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Role Description We are seeking a Senior Lab Operations Lead to own the day-to-day management and scaling of Until Labs' research facilities. This role is responsible for ensuring that a large, technically complex laboratory environment operates with high reliability, safety, and throughput. As Until Labs grows, this role will also play a key role in operationalizing expanded lab facilities, including helping stand up and scale into a new space, ensuring continuity of research and readiness for large-animal and GLP-adjacent work. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we

", "datePosted": "2026-01-26T14:15:31.215Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "563222bc0834a369c5b9e65177b4fd95" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 60 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/senior-lab-operations-manager-563222bc" } }, { "@type": "ListItem", "position": 12, "url": "https://fewerjobs.com/jobs/until/head-of-legal-d3d40d92", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Head of Legal", "description": "

Head of Legal at Until - Bay Area - Head of Legal Bay Area About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Role Overview This is a senior leadership role responsible for shaping Until's legal, IP, and risk posture as the company moves toward the clinic. The Head of Legal will act as a strategic partner to the executive team, influencing core technical, commercial, and regulatory decisions. About Until Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this challenge, we are laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients

", "datePosted": "2026-01-26T14:08:50.246Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "d3d40d92f37324d25f8795454713073a" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 96 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/head-of-legal-d3d40d92" } }, { "@type": "ListItem", "position": 13, "url": "https://fewerjobs.com/jobs/until/member-of-technical-staff-2c9a44e5", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Member of Technical Staff", "description": "

Member of Technical Staff at Until - Bay Area - Member of Technical Staff Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As an integration engineer at Until, you'll be working across teams to deliver next-gen perfusion, cooling, and rewarming systems. Successfully owning the deployment of these systems will require you to autonomously work across hardware/software stacks and work closely with scientists across the company. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for

", "datePosted": "2026-01-06T00:40:45.027Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "2c9a44e503998fc12e085ccd1eb138b7" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/member-of-technical-staff-2c9a44e5" } }, { "@type": "ListItem", "position": 14, "url": "https://fewerjobs.com/jobs/until/machine-learning-engineer-scientist-69c40714", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Machine Learning Engineer / Scientist", "description": "

Machine Learning Engineer / Scientist at Until - Bay Area - Machine Learning Engineer / Scientist Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We are also building out our medical hibernation team to tackle the challenges of whole-body cryopreservation, beginning with rodent models. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As a Machine Learning Engineer / Scientist at Until, you will be an early member of the computational team defining how experimental data becomes insight and drives the next round of scientific discovery. You'll build high-leverage ML systems that help develop new cryoprotectant formulations, engineer biologically-inspired antifreeze proteins, and understand the physics of vitrification and rewarming. You will own projects end-to-end including shaping data collection and designing data pipelines, training and evaluating models, and deploying tooling that scientists use daily. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge,

", "datePosted": "2025-11-25T20:57:40.817Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "69c407147e737d0c9bebc2d79b90bfc5" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "Doctorate", "url": "https://fewerjobs.com/jobs/until/machine-learning-engineer-scientist-69c40714" } }, { "@type": "ListItem", "position": 15, "url": "https://fewerjobs.com/jobs/until/engineer-hibernation-team-b673591d", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Engineer, Hibernation Team", "description": "

Engineer, Hibernation Team at Until - Bay Area - Engineer, Hibernation Team Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As an engineer on the hibernation team, you'll be building N-of-1 hardware and software stacks to cryopreserve whole organisms. This requires the ability to own mechanical design and fabrication, electrical design and bringup, and software architecture and development. If successful, you will be the principal engineer to demonstrate the feasibility of whole body reversible cryopreservation in rodents. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to

", "datePosted": "2025-09-29T16:56:06.345Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "b673591d14736747e80f87f8fd86ee3f" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/engineer-hibernation-team-b673591d" } }, { "@type": "ListItem", "position": 16, "url": "https://fewerjobs.com/jobs/until/software-engineer-e2dd7c46", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Software Engineer", "description": "

Software Engineer at Until - Bay Area - Software Engineer Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this time-critical challenge, we're laying the foundation for medical hibernation: pausing molecular motion to give patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, controlled-rate freezers, and vitrification and rewarming protocols for human tissue. We are also building out our medical hibernation team to tackle the challenges of whole-body cryopreservation, beginning with rodent models. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role As a Software Engineer at Until, you'll build the computational and infrastructure backbone that enables our science to move faster. You'll design and implement data pipelines, lab automation interfaces, and cloud-based systems that scale with our experiments. You will own projects end-to-end, collaborate across disciplines, and set a high bar for developing code that scales with the team. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this time-critical challenge, we're laying the foundation for medical hibernation: pausing molecular motion to give patients a bridge to future

", "datePosted": "2025-08-21T20:11:26.325Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "e2dd7c46337f3be648f33f702910d6b7" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/software-engineer-e2dd7c46" } }, { "@type": "ListItem", "position": 17, "url": "https://fewerjobs.com/jobs/until/sr-mechanical-engineer-fluidics-perfusion-fa8c9367", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Sr. Mechanical Engineer, Fluidics/Perfusion", "description": "

Sr. Mechanical Engineer, Fluidics/Perfusion at Until - Bay Area - Sr. Mechanical Engineer, Fluidics/Perfusion Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About the Role Accomplishing our mission requires skilled engineers pushing the boundary developing new systems for heat and mass transfer in N-of-1 perfusion and heat exchange devices. We're building a fast-paced, scrappy team of engineers to create technology indistinguishable from magic. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to

", "datePosted": "2025-08-13T06:54:17.464Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "fa8c936743fcf822b0e95640977a877d" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/sr-mechanical-engineer-fluidics-perfusion-fa8c9367" } }, { "@type": "ListItem", "position": 18, "url": "https://fewerjobs.com/jobs/until/mechanical-engineer-fluidics-perfusion-e77d8f0f", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Mechanical Engineer, Fluidics/Perfusion", "description": "

Mechanical Engineer, Fluidics/Perfusion at Until - Bay Area - Mechanical Engineer, Fluidics/Perfusion Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About You - Track record of exceptional engineering abilities - Deep understanding of heat and mass transfer principles - Experience designing fluidic systems for perfusion/heat exchangers - High degree of autonomy across full engineering stack: electromechanical design and fabrication, control software,

", "datePosted": "2025-08-13T05:33:44.209Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "e77d8f0f8fe86f771198cea096f2ed61" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/mechanical-engineer-fluidics-perfusion-e77d8f0f" } }, { "@type": "ListItem", "position": 19, "url": "https://fewerjobs.com/jobs/until/scientist-organ-perfusion-8e8982ed", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Scientist (Organ Perfusion)", "description": "

Scientist (Organ Perfusion) at Until - Bay Area - Scientist (Organ Perfusion) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We are seeking a Scientist to join our whole organ preservation team. You will apply your experience in perfusion, preservation, viability assessment and your passion for rapid protocol development to make successful large organ cryopreservation a reality. You will have the opportunity to collaborate with scientists and engineers across the company on variety of methods inspired by first principles of biology, physics, and chemistry. Creative scientific engagement is a requirement of the role, and new avenues for discovery and optimization are continuously supported. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal,

", "datePosted": "2025-07-30T05:13:40.167Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "8e8982edc84b19a56998e84a76a558ce" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "Doctorate", "url": "https://fewerjobs.com/jobs/until/scientist-organ-perfusion-8e8982ed" } }, { "@type": "ListItem", "position": 20, "url": "https://fewerjobs.com/jobs/until/physics-and-engineering-research-associate-da4b6b63", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Physics and Engineering Research Associate", "description": "

Physics and Engineering Research Associate at Until - Bay Area - Physics and Engineering Research Associate Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We're building an elite team of applied physicists, engineers, and materials scientists for true full stack engineering, from electrons to operating systems. Projects will require high degree of autonomy and breadth of skill across electrical, mechanical, and materials design, with a strong emphasis on first principles thinking. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is

", "datePosted": "2025-07-25T04:13:48.413Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "da4b6b6380dbd2b802ca853137bd9b9a" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/physics-and-engineering-research-associate-da4b6b63" } }, { "@type": "ListItem", "position": 21, "url": "https://fewerjobs.com/jobs/until/engineering-applied-physics-intern-spring-summer-2026-77c201dd", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Engineering/Applied Physics Intern (Spring/Summer 2026)", "description": "

Engineering/Applied Physics Intern (Spring/Summer 2026) at Until - Bay Area - Engineering/Applied Physics Intern (Spring/Summer 2026) Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do more with their internship than design a better genmoji. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. We're looking for talented young applied physicists, engineers, and materials scientists who want to do

", "datePosted": "2025-01-23T01:46:28.170Z", "employmentType": "INTERN", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "77c201dd27591cb13323949366d70818" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/engineering-applied-physics-intern-spring-summer-2026-77c201dd" } }, { "@type": "ListItem", "position": 22, "url": "https://fewerjobs.com/jobs/until/engineer-applied-physicist-db1d2816", "item": { "@context": "https://schema.org", "@type": "JobPosting", "title": "Engineer/Applied Physicist", "description": "

Engineer/Applied Physicist at Until - Bay Area - Engineer/Applied Physicist Bay Area Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and no terminal diagnosis is final because patients can safely wait for future medicine to arrive. About The Role We're building an elite team of applied physicists and engineers for true full stack engineering, from electrons to operating systems. Projects will require high degree of autonomy and breadth of skill across electrical, mechanical, and computational design, with a strong emphasis on first principles thinking and a desire to make technology indistinguishable from magic. Until is a moonshot company building a “pause button” for biology. Our near-term focus is organ-scale reversible cryopreservation: preserving donated organs at subzero temperatures without ice formation, then rewarming them uniformly for transplant. By solving this grand challenge, we're laying the foundation for whole-body reversible cryopreservation, giving patients a bridge to future cures. To achieve our goal, we are assembling an interdisciplinary team to develop perfusion systems, cryoprotectant formulations, and vitrification and rewarming hardware. We envision a future where no transplantable organ is lost to logistics, and

", "datePosted": "2025-01-23T01:42:37.458Z", "employmentType": "OTHER", "identifier": { "@type": "PropertyValue", "name": "Until", "value": "db1d2816d853f420178fdd1da7f6b4b7" }, "hiringOrganization": { "@type": "Organization", "name": "Until" }, "jobLocation": { "@type": "Place", "address": { "@type": "PostalAddress", "addressCountry": "US" } }, "directApply": false, "incentiveCompensation": "Equity (Options)", "experienceRequirements": { "@type": "OccupationalExperienceRequirements", "monthsOfExperience": 36 }, "educationRequirements": "no requirements", "url": "https://fewerjobs.com/jobs/until/engineer-applied-physicist-db1d2816" } } ] } ] }