Back End Developer - Must have an Active DV Clearance - Hybrid Location: Bristol, London, Manchester or Cambridge Salary: £70,000 - £120,000 (depending on experience) We are seeking a skilled and motivated Back End Developer to support the digital transformation of Defence services. If you're passionate about solving complex technical challenges and building scalable, secure platforms in mission-critical environments, this is an excellent opportunity to make a real impact. You'll work with cross-functional teams including front-end developers, UX specialists, architects and stakeholders, building the infrastructure and services behind modern, cloud-native applications. What you'll be doing: Developing end-to-end features as part of an agile, collaborative team Building and deploying cloud-native, containerised applications using technologies such as AWS Lambda, Spring Boot, NodeJS, Python FastAPI, Oracle, PostgreSQL and MongoDB Contributing to DevSecOps delivery pipelines, using tooling such as Atlassian, Jenkins, GitLab, OWASP and AWS services Applying Site Reliability Engineering principles to ensure solutions are resilient, reliable and cost-effective Supporting clients and end users in making technical product decisions by clearly explaining trade-offs and recommended approaches Participating in a community of engineers who share knowledge, run workshops and contribute to the wider engineering culture Looking beyond day-to-day responsibilities to identify small details, opportunities for improvement and added value for clients What we're looking for: UK Developed Vetting (DV) clearance is essential Hands-on experience in software development and a strong interest in writing quality code Solid understanding of back-end development using one or more of the following: Java, Python, TypeScript or JavaScript Familiarity with good engineering patterns and practices, and the ability to articulate them clearly Experience working in agile environments (Scrum, Kanban or similar) Enthusiastic about learning, collaborating with diverse teams and solving problems creatively Confident communicator who enjoys working with others and brings out the best in people