Prolific

Prolific is not just another player in the AI space - 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 Application 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. What you'll bring to the role Several years in application/product security or security engineering Strong knowledge of OWASP Top 10 (Web & API) and modern attack paths (e.g. auth flaws, SSRF, injection, business logic abuse, supply chain) Experience working with complex, large scale systems and modern architectures Hands on security testing experience (especially Burp Suite) across web apps and APIs Python for security tooling, automation, or custom detection (Django a plus) Experience implementing and tuning SAST, SCA, DAST, and secret scanning in CI/CD Practical threat modelling experience, including leading lightweight sessions Strong collaboration skills, able to clearly explain issues and drive remediation Builder mindset, you automate wherever possible Nice to haves Experience with Django, Vue.js, MongoDB, GCP Security champions or bug bounty programmes Supply chain security (SCA, SBOMs, dependency review) IaC security (e.g. Terraform, policy as code) Experience in scaling environments building out security practices What you'll be doing in the role You'll help secure Prolific's applications end to end, from hands on testing and code review to threat modelling and CI/CD security. You'll partner closely with engineers to identify and fix vulnerabilities, build and tune security tooling, and embed secure development practices across the SDLC. This includes running penetration tests, improving detection coverage, and staying ahead of emerging threats to continuously strengthen our security posture. Why Prolific is a great place to work We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation - one that reflects the breath and the best of humanity. Working for us will place you at the forefront of AI innovation, providing access to our unique human data platform and opportunities for groundbreaking research. Join us to enjoy a competitive salary, benefits, and remote working within our impactful, mission driven culture.

Application Security Lead Prolific is not just another player in the AI space - 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. 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 platform and the code that powers it is critical. We handle participant data, researcher credentials, payment flows, and API integrations, and we need someone to own how we protect all of it at the application layer. As Application Security Lead, you'll own Prolific's application security strategy and be the most senior security engineering voice in the organisation. You'll define and drive our Secure Software Development Lifecycle (SSDLC), set the standard for how security is embedded into engineering, and get hands on with code review, threat modelling, and security testing when it matters. You'll also manage our Senior Application Security Engineer and continue to own our compliance programme alongside these responsibilities. This is a player coach role. You won't just set strategy, you'll be in the code, leading by example, and building the security culture that scales with Prolific. You'll need deep engineering experience to earn the trust of our engineering teams, and deep application security experience to know where the real risks are. You'll report to the Head of Engineering/Platform and work cross functionally with product engineering, platform, data, TechOps, and legal teams. As we scale, there's a clear path for this role to grow into leading a broader security function. What you'll bring to the role Several years of experience in software engineering, you've built and shipped production systems at scale Several years in application security (testing, code review, threat modelling, vuln management) Expert knowledge of OWASP Top 10 (Web & API) and modern attack paths (e.g. auth flaws, SSRF, injection, business logic, supply chain) Strong understanding of modern architectures (microservices, APIs, event driven systems) Python for security tooling and automation (Django a strong plus) Hands on testing experience (e.g. Burp Suite) and manual assessment of apps/APIs Experience building and scaling SSDLCs, including CI/CD tooling (SAST, SCA, DAST, secrets) Experience leading threat modelling and security design reviews Strong engineering partnership skills, you influence through trust Experience with ISO 27001 / SOC 2 and translating controls into real engineering practices Clear communicator across technical and non technical audiences Nice to haves Experience mentoring or managing security engineers Experience with Django, Vue.js, MongoDB, GCP Security champions or bug bounty programmes Supply chain or infrastructure security (e.g. Terraform, Kubernetes) Experience building AppSec in a scaling company What you'll be doing in the role You'll own and evolve Prolific's application security strategy end to end, from hands on testing and threat modelling to scaling secure development practices across engineering. You'll act as the go to expert for application security, partnering with engineering leadership to balance risk and velocity, while building the tooling, processes, and culture needed to embed security into how we ship. This includes mentoring an AppSec engineer, leading high impact security reviews, owning vulnerability management, and ensuring our platform stays ahead of modern threats. Why Prolific is a great place to work We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation - one that reflects the breadth and the best of humanity. Working for us will place you at the forefront of AI innovation, providing access to our unique human data platform and opportunities for groundbreaking research. Join us to enjoy a competitive salary, benefits, and remote working within our impactful, mission driven culture. By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal information.

AI Trainer - Advanced HTML/ CSS Developers Remote The role We're looking for HTML/ CSS Developers to help train and evaluate cutting-edge AI models. If you have the necessary experience, we'll send you an assessment to test 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 $40/hr per AI task completed. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter. What you'll bring HTML/ CSS developer skills and verifiable professional experience as a HTML/ CSS developer A willingness to take our skills verification test to assess your suitability for our Domain Expert participant pool Strong attention to detail and the ability to concentrate on complex tasks for up to one hour at a time A reliable and fast internet connection and access to a computer A willingness to self-declare your earnings, as our participants are self-employed A Paypal account to receive payment from our clients What you'll be doing in the role Completing AI training tasks such as analyzing, editing, and writing HTML/ CSS Judging the performance of AI in performing HTML/CSS related prompts Improving cutting-edge AI models Key Technologies HTML / CSS

Prolific is seeking AI Trainers with strong HTML/CSS development skills for remote roles. The position involves training and evaluating AI models by completing tasks such as analyzing and editing HTML/CSS. Successful candidates will take an assessment to join as Domain Expert participants, with earnings around $40/hr. Ideal applicants will have verifiable experience, attention to detail, and a reliable internet connection. This is a self-employed position requiring a Paypal account for payments.

We're looking for Advanced Urdu Speakers 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 $30/hr per AI task completed. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter. What you'll bring Advanced language skills and verifiable experience as being fluent in Urdu. A willingness to take our skills verification test to assess your suitability for our Domain Expert participant pool. Strong attention to detail and the ability to concentrate on complex tasks for up to one hour at a time. A reliable and fast internet connection and access to a computer. A willingness to self declare your earnings, as our participants are self employed. A PayPal account to receive payment from our clients. What you'll be doing in the role Completing AI training tasks such as analyzing, editing, and writing in Urdu. Judging the performance of AI in performing Urdu prompts. Improving cutting edge AI models. Why Prolific is a great platform to join as a Domain Expert participant Joining our platform as a Prolific participant will give you the chance to influence the AI models of the future. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home. We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation - one that reflects the breadth and the best of humanity. Privacy Statement By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal information.

AI Trainer - Advanced Korean Fluency (UK) Remote 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 Advanced Korean Speakers 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 $30/hr per AI task completed. You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter. What you'll bring Advanced language skills and verifiable experience as being fluent in Korean. A willingness to take our skills verification test to assess your suitability for our Domain Expert participant pool Strong attention to detail and the ability to concentrate on complex tasks for up to one hour at a time A reliable and fast internet connection and access to a computer A willingness to self declare your earnings, as our participants are self employed A Paypal account to receive payments from our clients What you'll be doing in the role Completing AI training tasks such as analyzing, editing, and writing in Korean Judging the performance of AI in performing Korean prompts Improving cutting edge AI models Why Prolific is a great platform to join as a Domain Expert participant Joining our platform as a Prolific participant will give you the chance to influence the AI models of the future. Once you pass our assessment, you can join Prolific in just 15 minutes, and start enjoying competitive pay rates, flexible hours, and the ability to work from home. We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation - one that reflects the breadth and the best of humanity. By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal information.

AI Trainer - Visual & Graphic Design Expert Remote 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 are seeking Professional Graphic and Visual Designers to act as Domain Experts for a high-level AI evaluation project for $30p/h. AI models are evolving beyond simple image generation and now tackle complex design tasks such as layout, typography, and information density. We need experts who can see beyond "pretty pictures" to judge the professional utility, readability, and structural integrity of design outputs. This is a flexible, ad hoc project where your professional eye directly influences how AI understands design principles. What you'll bring Professional design credentials: You must have a formal education in Graphic/Visual Design plus at least 1 year of professional experience OR 5+ years of high-level experience working with professional clients. Technical literacy: You must be familiar with the industry-standard stack (Figma, Adobe Photoshop, Adobe Illustrator). While you won't be designing these tools for this task, you must be comfortable with the concepts and terminology associated with them. A critical eye: You can distinguish between "consumer grade" and "enterprise ready" content, ensuring outputs are professional and highly readable. Portfolio: A valid link to your portfolio or work samples is required during the screening process. What you'll be doing in the role Side by side preferences: Evaluate two candidate designs (e.g., Google Slides, posters, or advertisements) on the same topic and determine which better meets professional standards. Expert analysis: Judge candidates based on specific design dimensions, including readability, text density, information hierarchy, and overall professionalism. Edit Request verification: Review "before and after" style tasks to determine which AI output better satisfied a specific design edit or change request. Experimental tasks: Take part in new, narrow tasks aimed at refining how AI handles concise visual communication. Key Technologies General AI Training Image and Video Annotation Trust and Safety Evals Red Teaming Quality Analytics Experience in Interaction Design or Motion Graphics. A background in Brand Building, Advertising, or Marketing. Why join this project? This is a unique opportunity to act as an expert in the visual AI revolution. You'll be teaching the model the "why" behind good design, providing the professional sensitivity that algorithms currently lack. By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal information.

Prolific is seeking AI Trainer - Machine Learning Specialists to assist in training and evaluating advanced AI models. Successful candidates will have professional experience in machine learning and a commitment to completing tasks that pay up to $150/hr. Responsibilities include analyzing and editing training tasks, critiquing AI performance, and improving AI models. Join from anywhere in the United Kingdom, working flexibly with competitive compensation and the opportunity to influence the future of AI development.

Prolific is not just another player in the AI space - 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 Application 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. What you'll bring to the role Several years in application/product security or security engineering Strong knowledge of OWASP Top 10 (Web & API) and modern attack paths (e.g. auth flaws, SSRF, injection, business logic abuse, supply chain) Experience working with complex, large scale systems and modern architectures Hands on security testing experience (especially Burp Suite) across web apps and APIs Python for security tooling, automation, or custom detection (Django a plus) Experience implementing and tuning SAST, SCA, DAST, and secret scanning in CI/CD Practical threat modelling experience, including leading lightweight sessions Strong collaboration skills, able to clearly explain issues and drive remediation Builder mindset, you automate wherever possible Nice to haves Experience with Django, Vue.js, MongoDB, GCP Security champions or bug bounty programmes Supply chain security (SCA, SBOMs, dependency review) IaC security (e.g. Terraform, policy as code) Experience in scaling environments building out security practices What you'll be doing in the role You'll help secure Prolific's applications end to end, from hands on testing and code review to threat modelling and CI/CD security. You'll partner closely with engineers to identify and fix vulnerabilities, build and tune security tooling, and embed secure development practices across the SDLC. This includes running penetration tests, improving detection coverage, and staying ahead of emerging threats to continuously strengthen our security posture. Why Prolific is a great place to work We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high quality, ethically sourced human behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models, but from integrating diverse human perspectives and behaviours into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation - one that reflects the breath and the best of humanity. Working for us will place you at the forefront of AI innovation, providing access to our unique human data platform and opportunities for groundbreaking research. Join us to enjoy a competitive salary, benefits, and remote working within our impactful, mission driven culture.

Prolific is seeking a Senior Application Security Engineer to enhance application security across their platform. You'll work directly with engineering teams to find and fix vulnerabilities, conduct security testing, and implement secure development practices. Ideal candidates will have several years of experience in application security, knowledge of OWASP standards, and a hands-on approach to security challenges. Enjoy a competitive salary, benefits, and the opportunity to engage in impactful AI development work.