Full Stack Engineer (National Security) in Cheltenham

Business Unit: National Security

Employment Type: Permanent or Contract

Clearance: Must hold active UK Security Clearance

About the Opportunity

We are partnering with a leading Engineering business seeking experienced Full Stack Software Engineers to help deliver mission‑critical capabilities that protect the UK’s security and prosperity. You will work at the intersection of advanced engineering and real‑world problem‑solving, developing cutting‑edge products that counter evolving threats.

Our teams work with leading technologies across AI/DS, Cyber, Cloud, DevOps/SRE, and Platform Engineering, supporting customers across the National Security, Defence and Intelligence community. With long‑term programmes secured, this is an opportunity to join a high‑growth environment with genuine impact.

What You’ll Be Doing

• Designing, developing, and delivering secure, high‑quality software solutions.
• Producing clean, test‑driven code and ensuring adherence to engineering best practice.
• Translating logical designs into physical implementations and producing detailed designs.
• Integrating UI/API components with existing data stores and services.
• Maintaining and enhancing architectural elements such as data ingest pipelines, data stores and REST APIs.
• Collaborating with user researchers, product teams, and customers to align solutions with real user needs.
• Participating fully in Agile ceremonies: sprint planning, daily stand‑ups, demos, and backlog refinement.
• Contributing to technical strategy, innovation, and tactical upskilling across emerging technologies.

Key Skills & Experience

• Strong commercial experience with Spring Boot and Java Enterprise development.
• Front‑end proficiency with React, Vue.js, or AngularJS.
• Experience with modern testing frameworks and TDD.
• Ability to work across UI, API, and data layers.
• Technically curious and willing to adopt emerging tools and approaches.
• Strong documentation and design discipline.

Why Join?

You’ll be part of a trusted engineering organisation with over 60 years of heritage in sensors, communications, cyber, AI and ML. They solve complex challenges that make a tangible difference protecting people, platforms and missions, today and for the future.

Seniority level

• Mid‑Senior level

Employment type

• Full‑time

Job function

• Engineering, Consulting, and Information Technology

Industries

• Staffing and Recruiting, IT Services and IT Consulting, and Engineering Services

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