Senior Software EngineerPortsmouth | Hybrid, 3 days onsite£50,000-£75,000 plus bonus and benefitsThis Senior Software Engineer role is ideal for a hands-on engineer with experience in C++ and Unreal Engine, working on complex, performance-critical software across modelling and simulation, autonomy and geospatial domains. The position focuses on building robust, scalable systems while offering clear progression towards technical leadership.The role sits within a growing software and data science consultancy delivering end-to-end solutions across defence, energy, transport and health. You will work alongside experienced engineers, data scientists and subject matter experts on programmes covering modelling and simulation, autonomous systems, synthetic environments and digital twins.You will stay close to the code while contributing ideas, shaping solutions and engaging directly with customers.What you will be doing* Designing, developing and delivering software solutions across modelling and simulation, autonomy and geospatial domains* Working with technologies including wargaming, robotic and autonomous systems, digital twins and synthetic environments* Applying mathematical and computational methods to solve real-world problems* Contributing to technical consultancy projects, with opportunities to lead defined work packages* Analysing use cases and project context to shape requirements and specifications* Working across existing codebases and contributing to performance-critic