Principal Software Engineer

Principal Software Engineer Location: Fareham Permanent – Full Time Hybrid/Flexi Working £70,000 - £90,000 Our client is seeking a Principal Software Engineer to lead the development of advanced autonomy capabilities for unmanned systems. This hands‑on, R&D‑driven position involves shaping how autonomous vehicles think, plan, and behave in real-world environments. You’ll work across mission frameworks, guidance, behaviours, obstacle avoidance, and AI‑enhanced autonomy, taking concepts from early experimentation through to reliable, production‑ready deployment. This role also provides technical leadership and mentorship within a multidisciplinary engineering team. Key Responsibilities: Lead the design and development of high‑level autonomous behaviours for unmanned vehicles. Design, implement and optimise algorithms for path planning, obstacle avoidance, and mission autonomy. Build robust autonomy software using C++, Python, ROS2, DDS, and Linux-based systems. Integrate autonomy with perception, navigation and hardware systems. Write clean, structured and well‑documented code. Test and validate autonomy software in simulation and real‑world environments. Provide technical leadership, mentoring and guidance to engineering and research staff. Balance exploratory R&D with dependable, production‑ready delivery. About You Essential: Strong hands‑on experience in C++ and Python, including architecture and algorithms. Strong understanding of autonomous systems (motion planning, state estimation, behaviour‑based control). Experienced in Linux debugging, optimisation and performance tuning. Knowledge of real‑time systems, distributed computing and middleware. Background delivering software in both R&D and production settings. Strong communication skills and a practical, problem‑solving mindset. Desirable: Experience in ROS/ROS2, DDS, Sensor fusion, Deep learning perception, Simulation tools (Gazebo, CARLA, Unreal), Embedded/real‑time systems, Cloud robotics, Docker/Kubernetes, PX4/MAVLink, Defence/aerospace/maritime autonomy. Benefits 25 days holiday Flexible working hours Private medical insurance Pension scheme Life assurance Health care cash plan Cycle to Work Professional membership reimbursement Free parking Interested? If you’re ready to apply your expertise to a dynamic engineering environment and contribute to innovative vessel design projects, we’d love to hear from you. Apply today to take the next step in your career. Marine Resources Recruitment Ltd acts as an employment agency for permanent and fixed term contract recruitment and as a recruitment business for the supply of contract workers. Please note that by applying for this job you accept our Terms of Use and Privacy Policy which can be found on our website.