FullStack AI Engineer at Anson Mccade, Multiple Locations, £Contract Rate

Full Stack Engineer

Up to £575 P/D - Outside IR35 - 6months

Anson McCade is partnering with a forward-thinking technology consultancy to hire a Full Stack Engineer for an enterprise client engagement. You’ll build secure, well-tested Python services and support a React front end. You’ll also be part of a team that uses agentic AI tools like Claude Code every day. This role suits an engineer who moves quickly with AI but still checks every line before it goes into a pull request.

What you’ll be doing

• Designing and building APIs in FastAPI, using async patterns, middleware and Pydantic models
• Modelling data in PostgreSQL and managing schema changes with Alembic
• Building authentication and authorisation: SSO, JWT and role-based access control
• Making feature updates to a React and TypeScript front end
• Writing automated tests with pytest and a JavaScript test framework
• Working asynchronously in the client’s GitHub repository, following their conventions, review process and CI checks
• Using Claude Code (or similar) in your daily work and reviewing AI-generated code critically before raising PRs
• Coding securely: managing secrets properly, keeping sensitive data out of code and logs, and fixing security scan findings

What you’ll bring

• Strong commercial Python experience
• Hands-on FastAPI, Pydantic and Alembic (or a similar migration tool)
• Solid PostgreSQL skills: data modelling, query design and migrations
• Enough React and TypeScript to deliver minor features confidently
• Experience with SSO, JWT and RBAC
• A strong Git and GitHub workflow: branching, PRs, code reviews and CI
• Real day-to-day use of an agentic coding tool such as Claude Code

Nice to have

• PingFederate
• Rules-engine or workflow-engine design (configurable rules, conditional logic, versioned templates)
• Concurrency and data-integrity patterns: locking, idempotency, audit logging
• Azure: App Service, Key Vault, managed identity, Application Insights
• Advanced Claude Code use: custom skills, subagents, parallel worktrees, agent configuration
• GitHub Copilot for code review
• WCAG 2.1 AA and enterprise design systems
• Vite and the npm toolchain
• Experience on regulated or enterprise engagements such as pharma

Interested? Apply now or get in touch with Chris Macauley at Anson McCade for a confidential chat.