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 essentialContract 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 RoleYou''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 and Skills Java (primary language) plus exposure to JavaScript or PythonCloud platforms: AWS or AzureDevOps tooling: Jenkins, GitLab, Docker, Kubernetes, OpenShiftDatabases: SQL, MongoDB, ElasticsearchAgile delivery and CI/CD pipelinesExperience wor