Senior Software Engineer (C#) in Sunderland

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• Proven, senior-level C# skills - we’re looking for someone exceptional here

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• Strong knowledge of the .NET ecosystem - both legacy frameworks and modern .NET

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• Experience owning work end-to-end, from requirements through to live systems

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• Deep understanding of testing methodologies - unit, integration, and beyond

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• Ability to design software to a high technical standard, collaboratively

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• Experience mentoring others and influencing team direction

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• Excellent communication across technical and non-technical audiences

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• Understanding of compliance, regulations, and how they affect software delivery

hackajob is collaborating with Tombola to connect them with exceptional professionals for this role.

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The opportunity

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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.

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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.

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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.

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What you’ll be doing

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• Owning the full software delivery lifecycle - from requirements through to production

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• Designing and delivering robust, scalable solutions in C# across tombola’s platform

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• Driving engineering standards - code quality, testing practices, documentation

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• Influencing technical direction and contributing to architectural decisions

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• Mentoring and coaching developers at all levels

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• Leading code reviews and pair programming sessions

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• Working closely with stakeholders and non-technical colleagues to shape requirements

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• Monitoring application health and leading performance investigations

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• Contributing to agile ceremonies - standups, sprint planning, technical refinements

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• Ensuring compliance and regulatory considerations are built into delivery

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