Our client, a leading organisation in the Defence & Security sector, is currently seeking a Senior Software Developer to join their team in Cheltenham on a permanent basis. This is an excellent opportunity to work on mission-focused projects, where your input will have a real-world impact. Key Responsibilities: Developing and maintaining software solutions using languages such as C++, Python, and Linux Implementing containerisation using Helm and other relevant tools Collaborating with cross-functional teams to design scalable and supportable systems Contributing to the overall system architecture and providing input on best practices Engaging in continuous learning and professional development activities Ensuring the security and integrity of software solutions Testing and debugging code to ensure high-quality deliverables Documenting software designs and ensuring comprehensive test coverage Job Requirements: Experience in software development using C++, Python, and Linux Proficiency in containerisation, particularly with Helm Understanding of telephony and internet protocols and standards is desirable Experience with Rust and GoLang is a plus Active or recently active DV clearance Strong problem-solving and analytical skills Ability to work effectively in a team-oriented environment Excellent communication skills Benefits: 37.5 hour working week 10% of the working week allocated to self-directed personal development 25 days of leave (excluding public holidays) A strong commitment to work-life balance Attractive pension scheme with 10% employer contribution and 5% employee contribution If you are an experienced Senior Software Developer with a passion for making a difference in the Defence & Security sector, we would love to hear from you. Apply now to join our client's innovative and talented team in Cheltenham.