Critical Start jobs

B2B Tutor Operations Lead Barcelona, Catalunya, Spain We power people's progress. At Preply, we're all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it's creating real impact. We've just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we're only getting started. As a category-defining company, we're shaping what the future of learning looks like at global scale. Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day. Meet the team! Preply Business is growing fast - helping companies upskill global teams through personalized learning tied to business goals. To deliver at scale, we need a B2B Supply engine that is reliable, high quality, and built for corporate expectations. In B2B, “great supply” goes beyond availability - it means consistent delivery, strong quality signals, and a clear tutor experience designed for corporate learners. As the B2B owner in Supply Operations, you'll partner with B2B leadership, Product, and Operations to ensure our tutor ecosystem supports our corporate users. You'll own priority programs and improvements across the tutor & B2B lifecycles (e.g., owning B2B Tutor CSAT, lesson quality metrics

Early Talent - 2026 - D31 MI Central - Store Leadership Trainee Macomb (0007)

Lead, Quality Assurance Remote, Lagos, Nigeria Who we are Moniepoint Inc. is Africa's all-in-one financial platform, helping 20 million businesses and individuals access seamless payments, banking, credit, cross-border, and business management tools each month. As Nigeria's largest merchant acquirer, we power most of the country's point-of-sale (POS) transactions. Through our subsidiaries, Moniepoint Inc. processes over $250 billion in digital payment transaction value annually. About the role This is a high-impact leadership role responsible for owning and driving the strategy, execution, and culture of Quality Assurance across our Engineering teams. You will lead a team of smart, detail-oriented QA Analysts and Engineers, ensuring the products we build meet the highest standards of quality and reliability. You'll be working directly with developers, product managers, and engineering leadership to make sure everything we ship to our users is production-ready and delivers happiness. Curious about what makes Moniepoint an incredible place to work? Check out posts on how we cultivate a culture of innovation, teamwork, and growth. What you'll get to do - Lead the QA function across multiple engineering teams - drive quality standards, strategies, and frameworks that scale. - Mentor and manage QA Analysts and Engineers - help them grow into the best versions of themselves through coaching, feedback, and career development. - Design and enforce test strategies, including manual and automated testing, regression, performance, and exploratory testing. - Build out meaningful dashboards and metrics to measure QA performance: test cases written and executed, bug leakage, regression rates, and more. - Collaborate

Compliance Excellence Director Spain - Barcelona posted: Posted 8 Days Ago

KERING E-Commerce PMO (stage) Paris, France

Engineering Talent Pool San Francisco ABOUT PRIMER Primer is a growing network of K-8 schools restoring the timeless foundations of American education. Inspired by the original teaching primers that shaped a nation of readers, thinkers, and builders, our schools begin with what has always worked, and build for what lies ahead. Close-knit learning environments. Skilled educators. A culture that takes kids seriously as learners and leaders. Primers shaped the first 200 years of American children. Primer will ready them for the next. Don't see the right role for you? We're always looking to meet exceptional people. Primer is an end-to-end engineering organization building the operating system for real schools. Our work spans several technical disciplines. A non-exhaustive sample: - Distributed Systems & Data Infrastructure High-throughput GraphQL services, low-latency event pipelines, schema design for real-time classroom operations, transactional integrity across multi-tenant school networks. - Client Systems & Interaction Engineering Complex TypeScript/React architectures, high-frequency UI state updates, deterministic rendering under poor network conditions, resilient offline behavior, design-system engineering for high-context educational workflows. - Networking, Infrastructure & Reliability Full Dockerized service graph, CI/CD pipelines that ship daily into dozens of live campuses, observability at scale, automated failover, network shaping for unreliable school WiFi, performance engineering across heterogeneous hardware. - Realtime Media & Classroom Presence WebRTC transports, adaptive bitrate + packet recovery strategies, custom SFU optimizations for classrooms, audio/video error correction, telemetry-driven session stability, and real-time presence models for synchronous instruction. - Learning Systems

Critical Environment Technician (nightshift) Dulles, VA, US

Continuous Improvement Senior Leader Cleveland, Ohio, United States posted: Posted 30+ Days Ago

STAGE Césure - Ingénieur Machine Learning - H/F Crolles, France

KERING - Tech Lead Front Paris, France

Principal Software Development Engineer 3 Locations posted: Posted Yesterday

On Call Critical Minerals Expert - Remote Washington, DC Senior Critical Minerals Expert (On-Call, Part-Time/Hourly/Remote) Are you a critical minerals and materials expert with a deep understanding of the end-to-end supply chain-from mining and mineral processing to manufacturing, recycling, and commercialization? We need you. ICF is seeking an on-call Critical Minerals Expert to support work with the ICF's federal, state, local, and private sector clients. This is a remote, on-call role that provides flexibility to work from zero to 30+ hours per week, depending on project needs. In this role, you will help advance priorities aligned with U.S. Department of Energy (DOE) Office of Critical Minerals and Energy Innovation (CMEI) direction-including efforts to accelerate mining activities, diversify critical mineral and metals supply chains, stimulate innovation in processing and metallurgy, expand battery and magnet research, and facilitate recycling (including black mass and other battery materials). You may also support collaboration and engagement activities aligned with DOE's broader innovation ecosystem for critical materials-focused on coordination, commercialization, workforce development, and industry adoption of new technologies. What you will be doing: Providing subject matter expertise across the critical minerals and materials value chain (upstream mining to downstream manufacturing and circularity), with emphasis on U.S. supply chain resilience and energy innovation priorities. Supporting DOE CMEI technical and programmatic efforts related to: Mining and mineral production acceleration and modernization Processing, separation, refining, and metallurgy innovation Battery, magnet, and advanced materials supply chains Recycling and circular economy approaches, including battery materials Producing or reviewing high-quality client deliverables

Principal Applied Scientist San Jose posted: Posted Today

Director of Engineering, Upstart Bank United States | Remote About Upstart At Upstart, we're united by a mission that matters: to radically reduce the cost and complexity of borrowing for all Americans. Every day, we bring creativity, experimentation, and advanced AI to reshape access to credit, helping millions move forward financially with clarity and confidence. As the leading AI lending marketplace, we partner with banks and credit unions to expand access to affordable credit through technology that's both radically intelligent and deeply human. Our platform runs over one million predictions per borrower using more than 1,800 signals, powering smarter, fairer decisions for millions of customers. But the numbers only hint at the impact. Every idea, every voice, and every contribution moves us closer to a world where credit never stands between people and their financial progress. We're proudly digital-first, giving most Upstarters the flexibility to do their best work from wherever they thrive, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn't mean distant. We're intentional about in-person connection through team onsites, planning sessions, and moments that spark creativity and trust. And whether you choose to work primarily from home or collaborate in-person from one of our offices in Columbus, Austin, the Bay Area, or New York City (opening Summer 2026), you'll have the support to work in the way that works best for you. If you're energized by tackling meaningful problems, excited to innovate with purpose, and motivated by work that truly matters, we'd love to

Quality Assurance Operations Specialist Baarle Nassau posted: Posted Yesterday

Production Team Leader Bray, Ireland posted: Posted Yesterday

Principal Engineer - Continuous Improvement Lead India - Hyderabad posted: Posted 30+ Days Ago

Payroll Team Lead Canada - Mississauga posted: Posted Yesterday

Software Engineer - Mid level 2 Locations posted: Posted 30+ Days Ago

Admitting Representative - Labor and Delivery Yale Campus - Hospital Yale Campus - Hospital

Continuous Improvement Team Lead Monterrey, Nuevo Leon, Mexico posted: Posted 30+ Days Ago

Quality Assurance, AVP Dublin 2, Ireland posted: Posted 30+ Days Ago

Risk Advisory Services Principal 24 Locations posted: Posted Yesterday

Registered Nurse Critical Care Float Panama City, Florida, United States Join our team as a Registered Nurse in Critical Care Float, where you will implement and monitor patient care plans, coordinate with healthcare teams, and ensure high-quality patient care in a supportive environment.