IT & Software

Senior Software Engineer

Symmetric Headhunting

Lincoln · England · United Kingdom

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.

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Reference: WJ-766_21952616

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