Lead Full-Stack Developer

Experis - ManpowerGroup; Milton Keynes; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading tech support company is seeking a Lead Full Stack Developer for a hybrid role in Milton Keynes. You will spearhead the development of a cutting-edge, AI-enabled digital service for a major UK government programme. The ideal candidate will have strong expertise in Java and front-end technologies like React. You'll design user interfaces, develop APIs, and maintain relational databases while ensuring secure software delivery. This role requires you to work closely with various teams, contributing to a collaborative development environment.

Qualifications

• 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.

Responsibilities

• Design and build modern, responsive user interfaces.
• Develop using React, TypeScript, JavaScript, HTML, CSS.
• Design and develop APIs and services.

Skills

Full-stack application development

Java

React

API design

PostgreSQL

DevOps practices

Analytical skills

Tools

Spring Boot

Docker

AWS

Azure

GCP

Jenkins

Job description

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