Symmetric Headhunting

We're looking for a Senior Software Engineer C#. This is a hands on leadership role: you'll own major platform components, set technical direction, and drive the delivery of secure, scalable software on a multi-INT data fusion platform supporting next generation sovereign capability. You'll stay close to the code while guiding implementation approaches, maintaining architectural consistency, and mentoring engineers across your domain. Technical Stack ASP.NET Core - RESTful APIs & distributed services PostgreSQL or equivalent / relational databases What You'll Do Own and evolve significant platform components, hands on in C#/.NET Lead technical direction, design decisions, and cross team architectural alignment Build and support RESTful APIs and distributed services with ASP.NET Core Design and optimise PostgreSQL/relational database solutions for performance and reliability Lead technical investigations, prototypes, and R&D spikes to de risk delivery Mentor engineers and champion secure development and engineering standards What We're Looking For 3 to 5+ years' professional software development, with strong C#/.NET and ASP.NET Core Experience building RESTful APIs, distributed systems, or service based architectures Modern frontend experience with React or similar Strong relational database design and optimisation skills, ideally PostgreSQL Sound judgement on scalability, reliability, and secure software design Proven ability to take ownership, guide technical delivery, and build trust across teams Agile delivery experience and strong communication skills Bonus Points Experience in regulated environments; architectural documentation (C4, ADRs); DDD, clean or modular architecture; UX/accessibility awareness. Why Join? Take meaningful technical ownership on a strategically important programme, shape platform direction, and work alongside experienced engineers, architects, and DevOps specialists in a team where technical quality and professional development matter.