Contract Software Engineers – C# .NET & Ada

We are recruiting multiple experienced Contract Software Engineers to support current and future programmes within a leading defence and Electronic Warfare organisation. These roles sit within a mature engineering environment, delivering mission-critical software across advanced platforms.

This advert covers two separate contract roles, each with its own focus, responsibilities, and skill requirements.

Role 1: Contract Software Engineer – C# .NET
Location: Luton (Hybrid – 4 days onsite, 1 day remote)
Security Clearance: Full UK SC required (sole UK nationality essential)

Role Summary
We are seeking experienced C# .NET Software Engineers who can work with minimal supervision to deliver robust, high-quality software for current and future Electronic Warfare programmes. The role offers the opportunity to work within a mature development environment on cutting-edge defence technology.

Key Responsibilities

• Develop robust applications using C# .NET within a Windows environment
• Take ownership of complex tasks across the full software lifecycle (requirements through to delivery)
• Apply object-oriented design principles and verification/validation techniques
• Work collaboratively within skilled Agile teams while maintaining independence
• Contribute to CI/CD pipelines and modern development practices

Essential Skills & Experience

• Strong commercial experience with C# .NET, including web-based applications
• Solid understanding of object-oriented design and software development methodologies
• Experience across the full software lifecycle, including automated testing
• Familiarity with CI/CD practices
• Experience working in Agile environments (Scrum, Kanban)
• Ability to deliver high-quality solutions with minimal supervision

Desirable

• Defence or Electronic Warfare domain experience
• Experience with WPF, WinForms, Visual Studio
• Exposure to DOORS, Cameo, Azure DevOps
• Some C++ experience
• Microservices architecture experience

Role 2: Contract Software Engineer – Ada (Embedded / Real-Time)
Location: Luton (Hybrid – 4 days onsite, 1 day remote)
Security Clearance: Full UK SC required (sole UK nationality essential)

Role Summary
We are looking for an experienced real-time embedded software engineer with strong Ada expertise to support Defensive Aids development programmes across advanced Electronic Warfare systems. This role focuses on delivering high-integrity, mission-critical software within a structured engineering environment.

Key Responsibilities

• Specify, design, develop, and test real-time embedded software in Ada
• Deliver software to high-integrity and mission-critical standards
• Own complex tasks across the full lifecycle, from requirements through to integration and target testing
• Collaborate closely with hardware, firmware, and systems engineering teams
• Support integration, verification, and validation activities within mature development frameworks

Essential Skills & Experience

• Expert knowledge of Ada, including object-oriented design
• Strong debugging capability in embedded real-time environments
• Experience working with COTS RTOS
• Good working knowledge of UML
• Strong understanding of Verification & Validation techniques
• Experience in requirements engineering, hands-on integration, and target testing
• Background working within structured, high-assurance development processes

Desirable

• Defence / Electronic Warfare domain experience
• Experience with Dimensions, DOORS, Rhapsody, VxWorks
• Experience with AdaCore GNAT Pro and VectorCAST
• Development to RTCA/DO-178B or equivalent safety-critical standards

Meridian Business Support is a recruitment specialist acting on behalf of our client as an Employment Business for this vacancy.