Software Development Engineer

Our Client based in Basildonare looking for an experienced Software Development Engineer to join a specialist engineering team delivering secure Windows-based software systems for safety-critical and defence-related applications. This is a Temporary position until April 2026 with the possibility of extension. This role would suit a self-motivated engineer who is comfortable joining a project mid-stream, investigating existing code, and contributing to the next phase of development within a structured software lifecycle.

You will receive an initial onboarding period, followed by hybrid working with occasional on-site access to specialist test hardware.

Key Responsibilities Develop and maintain Windows applications using C#/.NET Contribute to secure communications software, including WCF-based components Review, understand, and reverse engineer existing code where documentation may be limited Work within a formal software development lifecycle (requirements, design, implementation, verification, compliance) Participate in design reviews and technical discussions Collaborate with other engineers using iterative / Agile-style development Ensure software meets quality, safety, and user expectations Essential Skills & Experience Strong professional experience in C# and .NET

Working knowledge of C++ (reading and understanding existing code)

Experience with Windows Communication Foundation (WCF) Proven ability to investigate and understand legacy or in-flight codebases Familiarity with software development life cycles, ideally within aerospace, defence, or other regulated environments Comfortable working to coding standards, processes, and documentation requirements Self-driven, proactive, and able to work with minimal supervision

Desirable Experience Background in aerospace, defence, or safety-critical systems WPF (Windows Presentation Foundation) for UI development Agile tools such as Jira or Azure Dev Ops Configuration management tools Exposure to embedded or systems-level software Security Requirements Must be eligible for UK Security Clearance (SC) UK national or NATO dual national required Meridian Business Support is a recruitment specialist acting on behalf of our client as an Employment Business for this vacancy.