Salary: £30,000 - 60,000 per year Requirements: 6 years software development experience Strong C# .NET backend expertise Experience building scalable APIs / distributed systems Solid SQL Server (or similar) knowledge Automated testing and CI/CD experience Deep understanding of OO design, patterns and clean architecture Strong communication and leadership skills Responsibilities: Leading design and delivery of complex backend features Providing technical direction and mentoring engineers Contributing to scalable architecture decisions Writing and reviewing high-quality C# .NET code Driving best practice across testing, CI/CD and deployment Troubleshooting and resolving complex production issues Technologies: Backend C# CI/CD SQL ASP.NET More: We are looking for a Staff Software Engineer to provide technical leadership within our Belfast-based team, delivering a high-availability transaction platform operating at serious scale. This hands-on senior role will allow you to shape architecture, guide engineering standards, and mentor developers while continuing to build robust, secure backend services. We offer hybrid working and strong benefits within a collaborative, delivery-focused culture. last updated 11 week of 2026