Full Stack Engineer - AI Product Delivery, Central Government

What you'll do

• Build and maintain full-stack features end to end on a Next.js frontend and a FastAPI backend, on Azure infrastructure (App Services, Blob Storage, Postgres, Terraform-managed containers)
• Integrate AI features into production, such as LLM workflows, speech-to-text and document generation, with a real, measurable outcome for users
• Co-build with frontline users in courts, prisons or probation, translating what they need into working software quickly
• Iterate fast while keeping security and reliability part of the same work throughout

What you'll need to show (this is where most applicants fall down)

• Genuine personal ownership of both the frontend and the backend, not one side with light exposure to the other. Expect to be asked directly what you built yourself on each side
• Real interface complexity on the frontend, not a single basic screen: separate views for different user types, an admin or ops view alongside the end-user one, or several distinct workflows within the same product
• Strong production experience with React/Next.js and a Python backend (FastAPI, Django or Flask)
• Postgres schema design and migrations, and solid API and authentication integration, ideally including OAuth and Microsoft Entra ID (Azure AD): app registration, token issuance and validation, and how that protects your API routes
• Hands-on experience shipping AI-native features into production with a measurable outcome for users, not just technical exposure to the underlying tools
• Version control, CI/CD, and strong communication with non-technical stakeholders

Also useful

• LLM feature-building: prompt engineering, structured outputs, multi-provider routing, retrieval-augmented generation
• Observability tools such as Langfuse or LangSmith
• Terraform and Azure (or equivalent AWS/GCP experience)
• Speech-to-text or audio pipelines
• Designing AI safeguards: prompt-injection defences, least-privilege access, human approval points, auditable decision trails
• A startup or entrepreneurial mentality, and genuinely current knowledge of AI

Rate and logistics

Day rate up to £700, inside IR35, fully or largely remote.

You will need to hold, or be eligible for, UK government security clearance (BPSS as a minimum; SC is desirable).