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£75000 GBPOnsite WORKINGLocation: Stevenage; Bristol, Central London, Greater London - United Kingdom Type: Permanent Senior Software EngineerLocation: Stevenage / Hertfordshire (5 Days Per Week Onsite) Job Type: Permanent Salary: Up to £75,000 depending on experience Overview An excellent opportunity has arisen for a Senior Software Engineer to join a market-leading defence organisation working on some of the UK's most advanced missile and weapon systems. This role sits within a dynamic and multi-disciplined team responsible for designing, developing and supporting the software that enables configuration, verification, and validation of product portfolio's. Spanning the full lifecycle from development through to production and field testing, this is a chance to contribute to mission-critical systems where your software directly impacts the certification, manufacturing output, and operational readiness of UK defence platforms. Key Responsibilities Design, develop, and support test software solutionsCollaborate with Electronic Engineering, Test Centre of Excellence, and Systems teams to deliver robust test capabilityProduce reliable, high-performance software in C, C++, or ADA with clear documentation and standards complianceInterpret a range of technical sources including engineering drawings, OEM data, and design safety justificationsContribute to technical verification and validation activities across operating and damage control documentationSolve complex technical problems that may extend beyond the bounds of software," engaging across hardware, simulation, and real-time systems Required Skills & Experience Essential: Pr