Software Engineers – C# .NET & Ada

Position: 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, Win Forms, Visual Studio
Exposure to DOORS, Cameo, Azure Dev Ops
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, Vx Works

Experience with Ada Core GNAT Pro and Vector CAST
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