Principal Software Engineer - C++ / Unreal | Defence Modelling & Simulation Leading the next generation of synthetic environments for UK Defence. This is a high-impact role for a technical authority to join a consultancy founded by industry experts. You will steer the development of complex digital twins and autonomous systems, bridging the gap between mathematical theory and real-world engineering. The Role Lead the design of UE5 based simulations, Robotic systems, and Digital Twins. Advise stakeholders on innovation and emerging simulation techniques. Line-manage engineering staff and lead small, agile delivery teams. Take ownership of bid management and technical proposal authoring. The Essentials Sole British Nationality is required. Minimum 7 years’ experience in Software Expert proficiency in C++ and Unreal Engine Proven ability to apply mathematical principles to scientific problem-solving. The Rewards 7% employer pension. Private healthcare & health cash plan. 25 days holiday Life Insurance. Clear pathway for rapid professional advancement. Portsmouth (Hybrid - 3 days on-site) Are you ready to shape the future of defence simulation? Click apply to find out more.