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About the job The Incubator for AI (i.AI) is a high-agency technical unit within the UK government, building and shipping frontier AI systems that materially change how government works. We combine startup pace with national-scale impact, guided by three principles. Talent: we work with some of the best researchers, engineers and product people in government and beyond. Innovation: we move at startup speed inside one of the world's largest organisations. Impact: we apply AI for the public good across health, planning, education, and the work of government itself. We are based in London, Bristol and Manchester, with hybrid working. Full Stack engineers at i.AI build the products and services that bring our AI capabilities to users: the interfaces, APIs, data layers, infrastructure and delivery pipelines that make AI safe, reliable and useful for citizens and civil servants. Our stack includes Python (Django, FastAPI), TypeScript, modern JS frameworks (React, Astro, Svelte), PostgreSQL, AWS and Terraform. We integrate frontier LLMs through providers and tooling such as Amazon Bedrock, and the AI-integration landscape evolves as the ecosystem matures. You will work in small cross-disciplinary teams alongside Applied AI Engineers, User Researchers, Designers and Product Managers. Job summary We build a portfolio of AI products at different stages of maturity, from early discovery through to services running at scale. You will be part of a small cross-disciplinary team working on one of these products, owning problems end-to-end and shipping real improvements for users. Over time you may move between products as priorities shift, giving you breadth across different problem domains and technologies. We’re looking for engineers who care as much about understanding the problem as writing the code, and who thrive when working closely with people from different disciplines. Job description Role responsibilities: Work with your team to develop a deep understanding of the problem space, participating in discovery, interrogating assumptions, and aligning on what success looks like. Shape technical approaches collaboratively, weighing trade-offs with designers, product managers and other engineers to arrive at solutions that work for users and the team. Deliver working software across the full stack, from infrastructure and data layers through to APIs and user interfaces, in small, frequent increments. Communicate openly by sharing progress, surfacing risks early, and documenting decisions so the team can move confidently. Maintain high standards through automated testing, code review, and operational practices that keep services reliable. Mentor and support other engineers through pairing, knowledge sharing, and constructive feedback. Get stuck in beyond building features, whether that's participating in user research, supporting a live service, or picking up unfamiliar work to keep the team moving. Person specification: We’d love to hear from you if you have: Strong experience building and maintaining production services across the stack, with depth in at least one backend language and one frontend framework. A collaborative mindset. You believe the best outcomes come from people with different skills and backgrounds solving problems together, and you actively invest in that. Experience shaping technical direction in ambiguous environments. You’re comfortable making decisions with incomplete information and revisiting them as you learn more. Clear, proactive communication. You naturally keep people around you informed and bring others into decisions. A commitment to quality through automated testing, code review, and thoughtful engineering practices. Experience of the following would be beneficial: Working in early-stage or greenfield product teams where the problem space is still being defined. Familiarity with our tech stack or similar technologies (e.g., Python, TypeScript,