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.
• 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.
We're a business that's genuinely driven by technology. Every product, every system, every feature — built in-house. That means your work has real impact, and the team you'll join knows and cares about that.
We've also got great benefits. Head to our careers site to see the full picture.
At tombola we know that our differences make us stronger and that thinking differently is key to long-term success. We work hard to create a culture of inclusivity where everyone is free to be themselves. We welcome applications from all backgrounds.
tombola is a technology company operating in the online gambling market. We came bouncing into the online bingo world in 2006, but our roots in bingo date way back to the 1800’s. We’ve grown rapidly over the years and entered the world of online slots in 2016 with tombola arcade. We’ve just embarked on a new chapter becoming part of Flutter entertainment, a FTSE100 company and the worlds biggest gaming company.
Staying true to our roots the tombola campus remains in Sunderland overlooking the River Wear and we invested in our international brands that help us take our Mackem business all around the world. We started in Italy, before venturing to Spain and beyond to Denmark and Sweden, along with our largest overseas office on The Rock of Gibraltar.
We’re completely unique in that all of our games are exclusive to us as they’re all designed, developed and managed in-house. We actively encourage our team to be involved from the ideas stage through to the live launch of a game and beyond. We innovate and we ask our people to push the boundaries of new technologies and give our customers the best experience possible.
We are built on a philosophy of taking a responsible approach, and putting the player first, always. We proactively engage with our customer community, ensuring our players are in control and receive great value for money. That’s really important to us. We encourage low-stake and aim to create a fun community that our players love.
We’re ambitious, we’re growing quickly and we’re looking for awesome people to join our already awesome team. #tombolalife is a lot of fun - we take pride in what we do, we work hard and we work together. We’re excited about the future and the team that will make an impact.
Come join the fun!
http://www.tombola.co.uk/careers
