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Senior Full Stack Engineer

Anson McCadeLondon🇬🇧United Kingdom

Quick overview

Salary£550/day
SeniorityMid Senior
Employment typeFull Time
Work modeHybrid
LocationLondon, United Kingdom
FastAPIGitSSOJWTPythonVaultVitepytestGenerative AIAzureReactPostgreSQLJavaScriptTypeScript

Job description

£550 GBP
Hybrid WORKING
Location: Holborn, Central London, Greater London - United Kingdom Type: Contract
We're looking for an experienced Senior Full Stack Engineer to join a high-profile programme within a heavily regulated organisation. This is a hands-on development role where you'll be building and enhancing modern applications while working within established engineering standards and delivery processes.
Rate: Outside IR35
Remote: Holborn
What You'll Need
  • Strong commercial experience with Python development.
  • Excellent knowledge of FastAPI, including API design, middleware and asynchronous programming.
  • Experience using Pydantic for data validation and API modelling.
  • Experience with Alembic (or similar schema migration tools).
  • Strong PostgreSQL skills, including data modelling, query optimisation and database migrations.
  • Experience with React and TypeScript to support front-end feature development.
  • Good understanding of authentication and authorisation, including SSO, JWT and role-based access control (RBAC).
  • Experience writing automated tests using pytest and JavaScript testing frameworks.
  • Strong knowledge of Git and GitHub, including branching strategies, pull requests, code reviews and CI pipelines.
  • Hands-on experience using Claude Code (or a similar AI coding assistant) as part of your day-to-day development workflow.
  • Ability to critically review AI-generated code before submitting pull requests.
  • Strong secure coding practices, including secrets management and resolving security vulnerabilities.
  • Experience collaborating asynchronously within established engineering standards and code review processes.
Desirable Experience
  • PingFederate.
  • Rules or workflow engine development.
  • Concurrency, locking, idempotency and audit logging.
  • Microsoft Azure, particularly App Service, Key Vault, Managed Identity and Application Insights.
  • Advanced use of Claude Code, including custom skills, sub-agents and agent configuration.
  • Experience using GitHub Copilot for code reviews.
  • Knowledge of WCAG 2.1 AA accessibility standards and enterprise design systems.
  • Experience with Vite and the npm ecosystem.
  • Previous experience delivering software within regulated enterprise environments such as pharmaceuticals, healthcare or financial services.

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