Software Engineer - C# Southampton - Hybrid, 3 days on-site - flexible hours Defence technology - security clearance required £55,000 - £60,000 benefits Are you an experienced C#/.NET Core developer looking to shape the future of defence training and simulation systems? As a Software Engineer, you'll join the project team early in a major initiative, working on training software tools for the UK military. You'll collaborate with a global team to learn and customise an advanced simulation product for UK needs and integrate it with various systems. Key Responsibilities: Develop and maintain applications/services using C# and .NET Core Integrate systems using Apache Kafka for event-driven communication Utilise Protobuf and FlatBuffers for efficient data serialization Collaborate with UK and international teams to deliver cutting-edge simulation solutions Essential Skills: Expertise in C# and .NET Core development. Proficiency in web interfaces (gRPC, WebAPI/REST). Strong software architecture and design skills. Desirable Skills: Experience with constructive simulation and distributed systems. Knowledge of Apache Kafka, Docker, and PostgreSQL. Security Requirements: Candidates must be eligible for BPSS and SC clearance and hold a UK passport. What’s on Offer: Salary up to £60,000, flexible and hybrid working, company shares, enhanced pension, private healthcare, and more.