Senior Software Engineer (.Net)

Senior Software Engineer – .Net (Back-End)

Location: Belfast (Hybrid Working)

Industry: Financial Services / Capital Markets

Type: Permanent

Are you a Software Engineer ready to take ownership of high-impact systems in financial markets? Do you thrive in fast-paced environments where reliability and performance matter?

My client, a global leader in capital markets infrastructure, is looking for a Senior Back-End Software Engineer to join their Rates & FX technology team in Belfast. This is a hands-on role where you'll build and maintain distributed, event-driven, cloud-native systems for internal broking services and external clients.

What You’ll Do

• Work closely with Solution Architects and Principal Engineers to design and deliver systems aligned with business and technical strategy.
• Lead by example within an agile, self-organising team to build scalable, maintainable software.
• Take ownership of technical delivery — from architecture to implementation and post-deployment support.
• Mentor junior engineers and support knowledge-sharing across the team.
• Continuously experiment and refine approaches to optimise speed, quality, and resilience.
• Raise risks early and communicate progress effectively to ensure smooth delivery.

Skills & Experience Required

• Strong experience in Software Engineering with demonstrable success in building backend systems.
• Experience building cloud-native, distributed, event-driven architectures.
• Skilled in developing RESTful APIs (experience with GraphQL is a plus).
• Proficient with relational databases (e.g. PostgreSQL, MySQL, MSSQL) including performance tuning.
• Experience working with cloud platforms such as AWS or Azure.
• Solid grasp of the software development lifecycle, from planning to release and production support.
• Comfortable with agile working practices and modern DevOps tools (CI/CD, containers, IaC).

Nice to Have

• Experience working in financial services or trading environments.
• Familiarity with FIX protocol and real-time messaging systems.
• Exposure to .NET (C#), Java, or React is advantageous.
• Experience with serverless architecture, microservices, and event-streaming tools like Kafka.
• Working knowledge of TDD, BDD, or other automated testing approaches.
• Proficiency in WPF or similar UI frameworks is a bonus.

Why Join?

• Work on complex systems with real-time, business-critical impact.
• Hybrid working with a collaborative, high-calibre engineering team.
• Modern tech stack and the autonomy to shape technical direction.
• Strong compensation, benefits, and career growth opportunities.

If this sounds like a fit, I’d love to hear from you.

If you have any further questions on the role, please feel free to reach out to Brendan McCrory directly.