Senior Software Engineer

Jobleads-UK • Belfast, Northern Ireland, United Kingdom • Posted June 15, 2026

Location Belfast, Northern Ireland

Job Type Full-time

Category other-general

Posted June 15, 2026

The Role
The Merchantware and Semi-Integrated platform is developed and maintained by our Belfast team. The platform handles millions of daily card transactions for customers ranging from small merchants to 70,000-seat stadiums. Throughput and resilience are critical as the platform is running at 100% uptime.

As a Senior Software Engineer on the Merchantware Gateway, you will contribute to the design and delivery of features on our product roadmap. You will develop backend services (and occasionally frontend components where needed) in collaboration with other engineers, product partners and technology teams. You will help refine solutions, ensure code quality, improve engineering practices, and support the delivery of secure, scalable and reliable payment services.

Duties include

Designing and implementing roadmap features to a high standard within your team

Participating in technical design discussions and contr...

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