Salary: £30,000 - 60,000 per year Requirements: Degree in Computer Science or a related discipline 6 years commercial software development experience Strong experience building server-side systems in a .NET environment (C#, .NET) Experience designing and implementing scalable web services Solid experience with relational databases such as SQL Server Strong understanding of design patterns, refactoring, and object-oriented design Excellent analytical, problem-solving, and communication skills Experience working in Agile delivery environments Must be based in Northern Ireland or within commuting distance to Belfast Responsibilities: Lead analysis, design, and development of complex, high-throughput software systems Drive best practices in unit testing, documentation, and code quality Advise on testing strategies, validation requirements, and remediation of complex issues Apply strong knowledge of engineering standards, methodologies, and PCI compliance Estimate and plan complex initiatives, projects, and technical improvements Support deployment activities across test and production environments Identify issues, assess impact, and communicate solutions clearly to technical and non-technical stakeholders Improve team effectiveness through ideas, mentoring, and technical leadership Support and coach engineers through hands-on guidance and on-the-job training Technologies: C# Support SQL Security Web ASP.NET Backend More: We are a global payment technology business operating at significant scale, powering commerce for organizations of all sizes across international markets. Our platforms process high volumes of transactions daily and are designed to operate with exceptional levels of resilience, security, and performance. With a well-established engineering presence in Northern Ireland, we continue to invest in building and evolving large-scale, high-availability systems that support critical payment flows across multiple regions. We offer a competitive salary up to £70k plus bonus, hybrid flexibility with a Belfast city centre office, 26 days annual leave plus bank holidays, private medical and dental cover, and a high trust environment with real ownership and influence, all underpinned by a strong focus on engineering excellence and professional growth. last updated 11 week of 2026