Principal Software Engineer - C++ and Rust - is required by highly successful and fast growingtechnology consultancy. They build data, AI and software solutions for clients in a broad range of industries, working on demanding problems in challenging environments. The role They are looking for a Principal Software Engineer to lead delivery on demanding software projects. This role is focused on C++ and Rust development. This is a hands-on role for an experienced engineer who wants to stay close to the code. You''ll lead a team of 6 to 12 engineers, own delivery end to end, and spend a meaningful share of your time writing code, reviewing designs, and unblocking the team. It''s a delivery role, not a strategy role. You''ll shape how we build things and how the team grows around you. Responsibilities Lead the delivery of complex software projects Work alongside other leads to set direction for the defence function Stay hands-on: set technical direction, design software and write code, leaning in where needed Mentor engineers across experience levels Plan and estimate delivery, manage technical debt, and make pragmatic trade-offs between speed, quality and long-term maintainability Work directly with clients to shape requirements, manage expectations and build trust Run code and design reviews, set the bar for quality, and hold the team to it Embed strong testing practices in the team''s workflow, from unit tests through to integration and acceptance testing What makes a great