Senior Software Developer (Contract)Location: Warton - Hybrid (3 days per week on site) Rate: £46.80 per hour (Umbrella) Contract Length: 12 months IR35: Inside IR35OverviewA leading UK defence company is seeking an experienced Senior Software Developer to join a highly skilled engineering team working on mission-critical, safety-critical systems used by military personnel.This role involves developing and maintaining a suite of engineering support applications that enable frontline users to retrieve operational data, diagnose issues, and ensure continued system availability in demanding environments. The position offers hybrid working and the opportunity to contribute to long-term, high-integrity software programmes within the defence sector.The RoleYou will work on a mature .NET desktop application estate, contributing to both enhancement and ongoing support activities. The software environment blends established systems with opportunities for modernisation and improvement, offering technically varied and meaningful work.In addition to core desktop applications, the team also develops smaller specialist utilities, creating exposure to a range of development challenges and platforms.Key ResponsibilitiesAnalyse system and user requirements to influence software design and delivery planningDesign, implement and configure new functionality with a focus on maintainable, high-quality codeProduce unit/module tests and associated software documentationSupport Build, Integration and Test teams during formal qualification and verification activitiesCollaborate closely with multi-disciplinary engineering teamsResearch and recommend new tools, technologies and development approachesShare knowledge, provide technical guidance and support continuous improvement within the teamEssential Skills & ExperienceStrong commercial experience using C#Experience developing desktop applications with WPF and/or WinFormsExperience working with or maintaining VB6 applicationsSolid understanding of structured software development in regulated or engineering-led environmentsDesirable ExperienceSource control tools such as Git or ClearCaseAutomated testing tools (e.g. Coded UI, Rational Robot or similar)Oracle, SQLCOM, .NET InteropXML (XSD/XSLT)Entity FrameworkTeam Foundation Server / Azure DevOpsQualificationsDegree in a STEM discipline or equivalent relevant industry experienceFor more information please contact Lauren Morley at JAM Recruitment or click apply. JBRP1_UKTJ