Senior Software Engineer (C#)

We're looking for a Senior Developer/engineer who's genuinely ready for a senior role - someone who can own the full software lifecycle, shape technical direction, and raise the bar for the team around them.

This isn't a stepping stone. It's a role where your experience and instincts will matter from day one. You'll be working on platform systems that power one of the UK's biggest gaming sites - everything built in-house, with real complexity and real stakes.

You'll be expected to drive quality, influence architecture decisions, and be a technical reference point for your peers. But you'll also be coding - we're not looking for someone who's stepped too far from the work. The best senior developers here do both.

What you'll be doing

• Owning the full software delivery lifecycle - from requirements through to production
• Designing and delivering robust, scalable solutions in C# across tombola's platform
• Driving engineering standards - code quality, testing practices, documentation
• Influencing technical direction and contributing to architectural decisions
• Mentoring and coaching developers at all levels
• Leading code reviews and pair programming sessions
• Working closely with stakeholders and non-technical colleagues to shape requirements
• Monitoring application health and leading performance investigations
• Contributing to agile ceremonies - standups, sprint planning, technical refinements
• Ensuring compliance and regulatory considerations are built into delivery

• Proven, senior-level C# skills - we're looking for someone exceptional here
• Strong knowledge of the .NET ecosystem - both legacy frameworks and modern .NET
• Experience owning work end-to-end, from requirements through to live systems
• Deep understanding of testing methodologies - unit, integration, and beyond
• Ability to design software to a high technical standard, collaboratively
• Experience mentoring others and influencing team direction
• Excellent communication across technical and non-technical audiences
• Understanding of compliance, regulations, and how they affect software delivery

Nice to haves

• SQL and data layer experience
• Experience working across both backend and frontend codebases
• Involvement in hiring and technical interviewing, At tombola, senior developers have genuine influence. Technology decisions are never handed down from above - they're made by the people closest to the work. You'll have real autonomy, real ownership, and the chance to help shape how we build for years to come.