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Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We're looking for people with Psychology experience to work as self-employed AI Trainers to help train and evaluate cutting-edge AI models from some of the world's biggest AI labs. If you have the necessary experience, we'll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you'll be invited to join Prolific as a Domain Expert participant, where you'll get paid to train and evaluate powerful AI models. Researchers looking for your skills tend to pay up to $50/hr subject to the length of tasks available. If successful, you must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter. 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we are the architects of the human data infrastructure that's reshaping the landscape of AI development. In a world where foundational AI technologies are increasingly commoditized, it's the quality and diversity of human-generated data that truly differentiates products and models. The role Security at Prolific isn't an afterthought, it's foundational to how we build. As a company trusted by world-leading research institutions and AI labs to handle sensitive data at scale, the security of our application layer is critical. We handle participant data, researcher credentials, payment flows, and API integrations that demand rigorous protection at the code level. As a Senior Security Engineer, you'll be the technical authority on application security at Prolific. You'll work hands-on with our engineering teams to find and fix vulnerabilities in our codebase, perform security testing, build security tooling, and embed secure development practices into how we ship software. This isn't a governance or policy role, you'll be in the code, reviewing pull requests, threat modelling new features, and building the automation that keeps our platform secure as we scale. You'll report to the Head of Engineering/Platform and work cross-functionally with product engineering, platform, data, and TechOps teams. 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In a world where foundational AI technologies are increasingly commoditized, it's the quality and diversity of human-generated data that truly differentiates products and models. The role Security at Prolific isn't an afterthought, it's foundational to how we build. As a company trusted by world-leading research institutions and AI labs to handle sensitive data at scale, the security of our application layer is critical. We handle participant data, researcher credentials, payment flows, and API integrations that demand rigorous protection at the code level. As a Senior Security Engineer, you'll be the technical authority on application security at Prolific. You'll work hands-on with our engineering teams to find and fix vulnerabilities in our codebase, perform security testing, build security tooling, and embed secure development practices into how we ship software. 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Mechanical Engineers (Remote) Remote AI Trainer - Mechanical Engineers About Prolific Prolific is not just another player in the AI space - we are building the biggest pool of quality human data in the world. 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Machine Learning Specialist (EST) Remote *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"7d8c6042-ac58-4acb-b90b-d08242002c4b\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"788a8b78-cfcd-42e1-beb1-30da5949a95d\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> AI Trainer - Machine Learning Specialists About Prolific Prolific is not just another player in the AI space - we are building the biggest pool of quality human data in the world. 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Machine Learning Specialist (UK) Remote *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"7d8c6042-ac58-4acb-b90b-d08242002c4b\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"788a8b78-cfcd-42e1-beb1-30da5949a95d\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> AI Trainer - Machine Learning Specialists About Prolific Prolific is not just another player in the AI space - we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We're looking for AI Trainer - Machine Learning Specialists to help train and evaluate cutting-edge AI models using real ML expertise. If you have the necessary experience, we'll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you'll be invited to join Prolific as a participant, where you'll get paid to train and evaluate powerful AI models. Researchers looking for your skills tend to pay up to $150/hr per AI task completed . You must be prepared to complete paid tasks that require one hour of uninterrupted work , though many are shorter. 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Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We're looking for Clinicians to help train and evaluate cutting-edge AI models. If you have the necessary experience, we'll send you a quick test to assess your skills and suitability for AI tasks. If successful, you'll be invited to join Prolific as a Domain Expert participant, where you'll get paid to train and evaluate powerful AI models. Researchers looking for your skills tend to pay $130p/h per AI task completed. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter. 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Machine Learning Specialist (PST) Remote *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"7d8c6042-ac58-4acb-b90b-d08242002c4b\" data-testid=\"conversation-turn-6\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> *]:pointer-events-auto scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" data-turn-id=\"788a8b78-cfcd-42e1-beb1-30da5949a95d\" data-testid=\"conversation-turn-8\" data-scroll-anchor=\"true\" data-turn=\"assistant\"> AI Trainer - Machine Learning Specialists About Prolific Prolific is not just another player in the AI space - we are building the biggest pool of quality human data in the world. Over 35,000 AI developers, researchers, and organizations use Prolific to gather data from paid study participants with a wide variety of experiences, knowledge, and skills. The role We're looking for AI Trainer - Machine Learning Specialists to help train and evaluate cutting-edge AI models using real ML expertise. If you have the necessary experience, we'll send you a quick 10- to 15-minute test to assess your skills and suitability for AI tasks. If successful, you'll be invited to join Prolific as a participant, where you'll get paid to train and evaluate powerful AI models. Researchers looking for your skills tend to pay up to $150/hr per AI task completed . You must be prepared to complete paid tasks that require one hour of uninterrupted work , though many are shorter. 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