Lead Full-Stack Developer

Lead Full Stack Developer
Rate: Up to £650/day (Outside IR35)
Duration: 6 months initially
Location: Hybrid - Milton Keynes / Remote
Clearance: SC Cleared

Overview
An exciting opportunity for a Lead Full Stack Developer to join a small, high-performing tech company supporting a major UK government programme. You'll play a key role in the development and evolution of a cutting-edge, AI-enabled digital service used across multiple government departments.
This role combines hands-on development with technical leadership, working closely with architects, product stakeholders, and client teams to deliver secure, scalable software solutions.

Responsibilities
Front End

  • Design and build modern, responsive user interfaces
  • Develop using React, TypeScript, JavaScript, HTML, CSS
  • Drive strong UX and cross-browser compatibility

Back End

  • Design and develop APIs and services
  • Build server-side logic using Java (Spring Boot)
  • Contribute to overall application architecture

Data & DevOps

  • Design and maintain relational databases (PostgreSQL preferred)
  • Implement CI/CD pipelines (e.g. GitHub Actions, Jenkins)
  • Deploy and operate services in cloud environments (AWS, Azure or GCP)
  • Use containerisation tools such as Docker

Quality & Collaboration

  • Lead and participate in code reviews
  • Write unit, integration and end-to-end tests (JUnit, Testcontainers, Vitest, Storybook)
  • Maintain clear technical documentation
  • Work closely with product, architecture and delivery teams
  • Embed security best practices (auth, access control, secure data handling)

Essential Skills & Experience

  • Strong experience delivering complex full-stack applications
  • Commercial expertise in Java plus at least one other back-end language (ideally Python)
  • Solid experience with React and modern front-end tooling
  • Strong API design and integration experience
  • Good working knowledge of Linux and Windows environments
  • Proven problem-solver with strong analytical skills
  • Experience with relational databases, ideally PostgreSQL
  • Comfortable working in small, fast-moving delivery teams
  • Able to commute to Milton Keynes as required
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Job Details

Company
Experis
Location
Milton Keynes, Buckinghamshire, United Kingdom
Hybrid / Remote Options
Employment Type
Contract
Salary
£600 - £650/day
Posted