Senior C++ Programmer

You'll take technical ownership of major C++ components within distributed, real-time maritime systems. Expect modern C++, high-integrity software development, complex systems integration, and involvement in architectural decision-making. You'll collaborate with systems engineers, hardware specialists and domain experts to deliver software that performs flawlessly in demanding operational environments., * Lead the design, development and optimisation of C++ software for advanced maritime defence systems.

• Own major components across real-time, embedded and distributed architectures.
• Drive architectural discussions, design reviews and technical strategy.
• Mentor mid-level and junior engineers, shaping engineering standards and best practice.
• Collaborate with systems, hardware and test teams across the full development lifecycle.
• Support integration, verification and validation across simulation environments and physical platforms.
• Ensure compliance with secure development practices and defence-sector engineering requirements.
• Contribute to long-term technical roadmaps for next-generation maritime systems.

This role suits engineers with deep experience in C++ who want to work on serious, long-lived defence platforms with real operational impact., * 8-10+ years' professional experience developing complex systems in C++.

• Expert-level understanding of modern C++ (C++11/14/17/20), STL, templates, memory management and performance tuning.
• Strong background in real-time, embedded or distributed systems.
• Solid Linux development experience and familiarity with modern tooling (Git, CI/CD, debugging/profiling tools).
• Experience working within high-assurance or safety-critical environments.
• Strong analytical mindset and the ability to solve complex engineering problems.
• Comfortable leading technical discussions and guiding engineering teams.
• Eligibility to work on defence projects (including the ability to undergo security vetting).

A major maritime defence contractor is seeking an accomplished Senior C++ Software Engineer to join its advanced engineering division in Portsmouth. You'll work on large-scale, highly complex naval systems that support surface ships, submarines and next-generation maritime platforms - technology where robustness, precision and engineering excellence are non-negotiable. This is a senior role offering exceptional working conditions, a world-class benefits package and the opportunity to influence mission-critical systems used across the Royal Navy and allied fleets. If you're an experienced C++ engineer looking to apply your expertise to meaningful, long-term defence programmes, this is a standout opportunity.