Salary: £54,000 - 94,000 per year Requirements: Active SC clearance Eligibility for eDV clearance (UK national or other qualifying criteria) Software engineering experience across design, development, testing and deployment Proficiency in one or more key languages: Java, Python, C++, C#, JavaScript Understanding of secure software engineering principles Experience with CI/CD pipelines and version control (Git) Familiarity with modern development practices and automated testing Ability to work 2-3 days per week on-site in Gloucester or London Strong communication skills, including working with multidisciplinary teams Responsibilities: Designing and developing secure, reliable and scalable software components Writing high-quality, well-tested code suitable for sensitive environments Supporting CI/CD pipelines built for restricted or hybrid networks Collaborating with systems engineers, cyber specialists and product teams Contributing to architecture decisions and technical roadmaps Troubleshooting complex issues across distributed and secure systems Applying strict coding, security and governance standards Documenting key decisions, processes and technical designs Working with teams embedded inside defence and intelligence organisations Technologies: C# CI/CD Embedded Git Support Java JavaScript Python Security C++ Cloud Docker Kubernetes More: We are a leading organization focused on building secure, mission-critical systems that help protect the UK. Our team excels in delivering secure, resilient, and sophisticated software solutions that support critical operations in the Defence and National Security sectors. The role offers the chance to work on-site in either Gloucester or London (2-3 days per week) with a supportive engineering culture. Our work environment encourages collaboration and knowledge-sharing, and we provide robust training and progression routes into tech leadership and specialist roles. last updated 8 week of 2026