Software Engineer - C# / .NET

Requirements

Must have:

- 7 years commercial software engineering experience - Strong background in backend development using C# / .NET - Proven experience designing and building scalable, distributed systems - Strong experience with RESTful APIs and web services - Solid knowledge of relational databases (SQL Server or similar) - Strong understanding of object-oriented design, design patterns, and system architecture - Experience influencing technical direction or mentoring engineers - Excellent problem-solving and communication skills - Experience working in Agile environments - Must be based in Northern Ireland or within commuting distance of Belfast, with the right to work in the UK.

Responsibilities:

- Lead the design and development of complex, scalable, high-throughput systems - Influence architectural decisions and contribute to long-term technical strategy - Drive best practices across code quality, testing, and maintainability - Provide technical leadership and mentorship to engineers across the team - Collaborate with cross-functional teams to deliver features from roadmap to production - Identify performance, scalability, and reliability improvements across the platform - Support production systems, troubleshoot complex issues, and drive root cause analysis - Contribute to CI/CD pipelines and continuous delivery practices - Promote a culture of engineering excellence, ownership, and continuous improvement.

Company:

We are a Fintech technology organization operating at significant scale, enabling seamless commerce across international markets. Our platforms process millions of transactions daily and are engineered for high availability, security, and performance. With a well-established and growing engineering hub in Northern Ireland, we continue to invest heavily in modernizing and scaling systems that underpin critical payment flows across multiple regions.

We offer a competitive salary up to £75k plus bonus, hybrid working 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 autonomy. Join us and seize the opportunity to shape architecture on a mission-critical platform while focusing on engineering excellence and career progression.