C# / .NET Developer (Defense)

Senior C# / .NET Developer – Autonomous C2 & Mission-Critical Systems

Join a top-tier defense tech organization at the forefront of autonomous technology.

We are looking for a Senior C# / .NET Developer to take ownership of complex Command & Control systems, combining core system maintenance with active legacy-to-modern migration (.NET Framework/WinForms to modern .NET).

Key Focus: Architectural modernization, high-reliability software engineering, and shaping the future of autonomous mission control.

What does the role include?

• Development and maintenance of systems using C# / .NET.
• Working with WinForms-based desktop applications.
• Taking part in modernization processes for legacy systems.
• Upgrading and migrating systems from .NET Framework to .NET Core / modern .NET technologies.
• Refactoring and improving the architecture of existing systems.
• Developing new capabilities while maintaining the stability and functionality of legacy systems.
• Working with complex, highly integrated systems, including Command & Control systems (C2 / C4I).
• Working with interfaces, services, and external systems.
• Troubleshooting, code analysis, and performance optimization.
• Working as part of a development team and collaborating with system engineers, architects, QA, and other engineering stakeholders.

Requirements

• Significant experience developing in C#.
• Hands-on experience with .NET Framework / .NET.
• Experience developing and maintaining WinForms applications.
• Experience working with complex systems and multiple interfaces.
• Experience with modernization / migration processes of existing systems.
• Experience migrating or upgrading systems from .NET Framework to .NET Core / modern .NET versions.
• Experience with Command & Control systems – must.
• Ability to understand and analyze large codebases and legacy systems.
• Ability to work independently as well as part of a team.

Significant advantages

• Previous experience in the defense sector / defense industries.
• Experience developing C2 / C4I or mission-critical systems.
• Experience with system architecture and design patterns.
• Experience with WPF.
• Experience with multithreaded, real-time, or event-driven systems.
• Experience with CI/CD, Git, and automated testing.
• Experience migrating monolithic desktop applications to modular or service-based solutions.