Software Engineers - Senior to Principal Level (DV Cleared) Location: Cheltenham (Onsite) Salary Range: £47,000 - £105,000 per annum (dependent on level and experience) Clearance Required: Current UK Developed Vetting (DV) is essential Contract Type: Permanent We are hiring Software Engineers across a range of levels (Senior, Lead, and Principal) to support high-priority defence and national security programmes. These are onsite roles based in Cheltenham, working on long-term, mission-critical systems that shape the future of UK defence technology. Whether you're looking to step up into a lead role or are already operating at principal level, these positions offer the opportunity to join a collaborative, purpose-driven engineering environment with access to exciting, impactful work in secure environments. About the Role You'll be working with modern Java-based tech stacks to deliver scalable, resilient software solutions. Projects span infrastructure, data, and cloud transformation, with a focus on agile delivery and engineering excellence. You'll have the opportunity to influence architecture and design decisions, mentor team members, and contribute directly to the ongoing enhancement of national security platforms. Key Technologies & Skills Java (primary language) plus exposure to JavaScript or Python Cloud platforms : AWS or Azure DevOps tooling : Jenkins, GitLab, Docker, Kubernetes, OpenShift Databases : SQL, MongoDB, Elasticsearch Agile delivery and CI/CD pipelines Experience working in secure or regulated environments What We're Looking For Proven software engineering experience at senior or leadership level Strong problem-solving and communication skills Commitment to engineering best practices and continuous improvement Current UK DV clearance is mandatory What You'll Get Competitive salary based on experience and level Flexible working options including 9-day fortnight and compressed hours Private healthcare, performance bonus, and strong career development support Opportunities to work on meaningful, long-term projects with real-world impact If you're a driven engineer with DV clearance and a strong Java background, this is your chance to join a forward-thinking, security-focused engineering team working at the heart of UK defence. Apply now to explore where your skills could take you.