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Engineering Manager (Frontend Focus)
Engineering
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
At Prolific, our product development group is a powerhouse of Engineering, Product, Data, Design, and Research – all working in lockstep. You'll thrive in cross-functional teams, each with a clear mission and the freedom to self-organize and innovate towards the best possible outcomes. We're passionate about moving fast and continuously improving, and we champion strong engineering principles and a culture of strong ownership.
As an Engineering Manager, you won't just manage; you'll inspire, empower, and elevate. You'll cultivate high-performing engineers and champion good engineering practices. Working hand-in-hand with your Product Manager, you'll ensure your team is not just set up for success, but poised to deliver exceptional customer impact.
This is a hands-on technical leadership role where your expertise will directly impact the technical excellence of your teams' work. You'll be instrumental in driving technical decision-making and collaboratively building scalable, resilient, and maintainable systems that power the future of AI.
What you’ll bring to the role
- Experience in engineering management or equivalent coaching, mentoring and leadership experience as an individual contributor
- A demonstrable track record of building products and leading complex initiatives and designing systems
- Exceptional problem-solving and deep understanding of software engineering
- Clear and structured communication skills, with an ability to lead diverse teams, influence stakeholders, and collaborate effectively across all levels and disciplines.
- 5+ years of professional software development experience, including hands-on expertise building highly available, transactional, and distributed cloud-based applications
- Strong web frontend expertise with proven experience building secure and customer facing frontend applications and strong knowledge of modern web technologies
What you’ll be doing in the role
- Lead, coach engineering teams to consistently deliver outstanding customer value.
- Nurture the professional growth of your engineers, including impactful hiring, onboarding and performance management.
- Create a healthy and predictable pace of work by proactively planning, removing blockers, orchestrating dependencies, and fostering crystal-clear communication within and beyond your team.
- Collaborate closely with product managers and your team to define both what to build and how to build it
- With your team, drive the technical solution design and implementation, ensuring alignment with the overarching technical direction
- Collaborate closely with product managers and the team to manage technical debt and toil and provide support for existing systems
- Contribute to defining and evolving Prolific's engineering practices and cross team initiatives
Key Technologies
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- Cloud Platforms: Google Cloud Platform (GCP), Amazon Web Services (AWS)
- Programming Languages: Python, JavaScript, TypeScript, Vue.js
- Frameworks: Django Rest Framework, Serverless architectures, container-based services
- Databases: MongoDB, DynamoDB, Postgres
- DevOps & Monitoring Tools: CircleCI, GitHub Actions, Kubernetes, Celery, EventBridge, DataDog
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 behavioral 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 behaviors 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.
Links to more information on Prolific
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.
Ready to apply?
Apply to Prolific
Senior Application Security Engineer
Engineering
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)
- Hands-on certifications (OSCP, GWAPT, BSCP)
- 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 behavioral 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 behaviors 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.
Links to more information on Prolific
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.
Ready to apply?
Apply to Prolific
Application Security Lead
Engineering
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 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)
- Hands-on certifications (OSCP, GWAPT, BSCP, CISSP)
- 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 behavioral 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 behaviors 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.
Links to more information on Prolific
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.
Ready to apply?
Apply to Prolific
Senior Product Engineer
Engineering
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
We’re looking for Senior Software Engineers with a ‘product builder’ mind-set to join our team and take a pivotal role in the development and guidance of our product. As a ‘t-shaped’ engineer, you will bring a broad practical knowledge across various areas of software development, complementing and supporting our growing team whilst likely having a deeper specialism in front or backend. This is an exciting opportunity to leverage your existing skills, experience, and knowledge to significantly influence the trajectory of our product as we aim to revolutionize research.
What you’ll bring to the role
- Deep understanding of modern web applications
- Experience building Typescript/Javascript applications and using NoSQL databases
- Experience using Python
- Knowledge of Event-Driven Architecture
- Experience using AWS (Serverless) and/or GCP
- Understand the importance of driving quality into code through test automation
- Have supported applications in production, with demonstrable experience of good observability practices within a full stack environment. (e.g. Rum, Tracing)
- Have worked in a collaborative environment with strong engineering practices and know what good engineering looks like
- Care about the product life cycle and are customer value focused
- Understand the value of continuous, iterative improvement using data to drive decisions and a culture of feedback
- Passionate about software development with an appetite for learning and self-improvement
What you’ll be doing in the role
- As a member of a cross-functional, stream-aligned team, you will work collaboratively with the teams’ engineering manager, product manager, designer, and up to 4-5 other engineers, including a tech lead
- Using agile software development practices and a product mindset, you will work as a team to plan, build and support software that our customers love
- You will be highly self-motivated and energetic and enjoy working in a fast-paced environment with a bias for action
- Collaborating with teams outside of product engineering, working closely with customers and understanding their needs
- Be happy working in all the major cloud providers: AWS, GCP & Azure
- With a You Build It, You Run It mindset, you will have intimate knowledge of our products from code commit through to production operation
- Supporting production systems with monitoring tools such as Datadog
- Strive for stable systems observability
- You will champion our principles, fuel a growth mindset by getting involved in communities and help improve our engineering culture
- Pushing the boundaries, questioning the status quo, ensuring what we are doing and what we are building has high value and impact for our users
Key Technologies
- Cloud Platforms: Google Cloud Platform and AWS
- Programming Languages: Python, JavaScript, and TypeScript
- Frameworks: Vue.js, Django Rest Framework, Container-based and Serverless architectures
- Databases: MongoDB and DynamoDB
- DevOps and Monitoring: CircleCI, GitHub Actions, Kubernetes, Celery, EventBridge and DataDog
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 behavioral 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 behaviors 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.
Links to more information on Prolific
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.
Ready to apply?
Apply to Prolific
Senior Product Engineer
Engineering
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
We’re looking for impact-focused Software Generalists to join our specialized team focused on serving frontier model creators and enterprise AI application developers. As a full-stack engineer, you will work across Prolific’s domains to solve customer and product problems.
This is an exciting opportunity to work directly with frontier AI companies, making critical technical decisions that balance scrappy startup execution with scalable, reliable engineering, as Prolific revolutionizes research for the AI community. You'll will have regular in person collaboration with customers and our US team, as well as collaborate closely with our UK-based tech teams.
This role is hybrid based out of our San Francisco office, approx 1-2 days a week.
What you’ll bring to the role
- Over 4 years of experience in a product engineering role
- Can translate business concepts into software models
- Ability to quickly learn and adapt across the breadth of Prolific’s domains
- Familiar working in both monoliths and distributed systems
- Strong communication and collaboration skills for direct customer interaction
- Good understanding of modern web applications and architecture design patterns
- Experience supporting applications in production environments
- Judgment to balance scrappy startup execution with scalable, reliable engineering
- Comfort with rapid iteration and responding to customer queries with urgency
- Experience with some of our technology stack:
- Python (we use Django & Fast API)
- TypeScript and JavaScript (we use Vue.js)
- SQL and NoSQL databases (we use MongoDB and PostgresSQL)
- Building and deploying to the cloud (we use GCP, Kubernetees, Github Actions & CircleCI)
- Instrumenting, monitoring & observability (we use Datadog)
What you’ll be doing in the role
This is a unique engineering role at Prolific.
In this role, you will operate with high ownership and a product mindset, at start-up pace, to solve customer problems and capture business opportunities irrespective of the technology required to do so.
You will be part of a cross-functional Product Engineering team, optimised for the success of a single customer group. You will collaborate directly with account managers, customer success specialists and customers to deeply understand their problem spaces. You will ideate and build with autonomy, supported by a high-performing team.
This role will see you work across Prolific domains to solve customer problems, needing you to get up to speed quickly and deliver across shared codebases to a high engineering standard. You will also help support our systems in production & respond to incidents when required.
Key Technologies
- Cloud Platforms: Google Cloud Platform and AWS
- Programming Languages: Python, JavaScript, and TypeScript
- Frameworks: Vue.js, Django Rest Framework, Container-based and Serverless architectures
- Databases: MongoDB and DynamoDB
- DevOps and Monitoring: CircleCI, GitHub Actions, Kubernetes, Celery, EventBridge and DataDog
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 behavioral 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 behaviors 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.
Join us to enjoy a competitive salary, benefits, and remote working within our impactful, mission-driven culture. At Prolific, our compensation packages for eligible roles include base salary, equity, and benefits. Many roles also include the opportunity to earn a cash variable element, such as a bonus or commission. Each job posting shows a salary range that reflects the minimum and maximum target for new hires, based on the role’s location as well as your skills, experience, and relevant education or training. You can check the job posting’s subtitle to see where the position is based. Your recruiter will also be happy to share the specific salary range for your preferred location during the hiring process.
For pay transparency, the base salary range for this full-time role in San Francisco is $200,000 - $250,000 per annum.
Links to more information on Prolific
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.
Ready to apply?
Apply to Prolific