Tournament Software is the global market leader in racket sports technology, the platform behind tournaments, competitions, rankings, and real-time scores for tennis, padel, and badminton worldwide. Sports federations, clubs, and players in over 160 countries rely on it every day.From our office in Alkmaar, a team of around 30 people builds the technology that keeps the global racket sports community connected. We've been growing at over 15% a year, and we're just getting started. The next phase of international expansion is already underway.What you'll work onThe project has been in development for three years and is now entering a new growth phase. There are legacy components and opportunities to improve engineering best practices, so the work will be challenging and offer plenty of room to make a real impact.You'll work across backend functionality, SQL data access, and React The work is a mix of building new features, improving existing functionality and solving complex bugs in a production system.A big part of the role is understanding how things currently work, tracing issues through code and data, and making safe, maintainable improvements. You'll own a slice of the work end to end: from understanding the problem to production. "Done" means customers are using it reliably and getting value from it.The environmentThe codebase has 30 years of domain logic built by people who know racket sports inside out. Yes, there's legacy, and yes, there's room to modernise. But that's exactly where the opportunity is. You'll work on systems that handle 40,000 tournaments a year, with a team that has the ambition and the backing to do things properly going forward.If you're the kind of developer who finds satisfaction in making complex systems cleaner, faster and more reliable, and seeing that work matter to real users, this is a genuinely interesting place to be.About youWe are looking for a mid-to-senior full-stack engineer, ideally with a slight back-end focus. The platform was originally built for one anchor client and is now scaling to support multiple customers across different markets, bringing higher volumes, greater variety and exciting technical challenges.Solid C#, .NET, React and SQL experience (non-negotiable)A track record of shipping features to productionComfortable operating in a large long-lived codebaseYou think in problem solving, not ticketsCan commute to Alkmaar 3 days per week: Monday/Wednesday/Thursday. Make sure you're roughly within 40 minutes travel.Nice to have: SQL Server experience specifically, affinity with racket sports.Why you want to work at Tournament SoftwareYour code runs tournaments for federations across 160 countries, the impact is real and the scale is globalYou'll collaborate directly with international sports organisations, from national tennis federations to badminton associations across four continentsThe product is genuinely unique, and so is the community you're building forReal room to grow in seniority and to develop your own approach, not just execute someone else's playbookCompetitive employment conditions, including pension (~2.5%), travel allowanceChoice to work between 28 and 40 hours/weekInterested?Does this sound like you? Contact Dick Naezer at dick@sunnysideup.company, he's managing this search on behalf of Tournament Software

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C#/.Net Fullstack Developer