Full Stack Software Engineer
Location: 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.