Salary: £55,000 - 70,000 per year Requirements: At least 5 years experience designing and delivering performant software applications Proficiency in C, C++ or C# alongside Python Experience with Unreal Engine or similar game-engine technology Understanding of software modelling and simulation techniques Experience in areas such as entity or event-based simulation, robotics or autonomous systems Confidence working with large codebases and understanding performance and hardware constraints Strong communication skills and the ability to work directly with stakeholders Degree-level education or equivalent experience with a strong STEM or computing background (desirable) Experience within UK defence or other regulated environments (desirable) Responsibilities: 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-critical systems Building and maintaining effective customer and stakeholder relationships Supporting technical reporting and presenting work to customers Technologies: C# Hardware Python Robotics Unreal GameDev C++ Security More: We are a growing software and data science consultancy delivering end-to-end solutions across defence, energy, transport, and health. This Senior Software Engineer role is ideal for a hands-on engineer experienced in C++ and Unreal Engine, focusing on building robust, scalable systems while offering clear progression towards technical leadership. We offer hybrid working with 3 days onsite in Portsmouth, competitive salary from £50,000 (flexible based on experience), 7% employer pension contribution, private healthcare, life assurance, 25 days holiday with additional purchase options, and structured mentoring along with training opportunities. last updated 5 week of 2026