Every day, Global Payments makes it possible for millions of people to move money between buyers and sellers using our payments solutions for credit, debit, prepaid and merchant services. Our worldwide team helps over 3 million companies, more than 1,300 financial institutions and over 600 million cardholders grow with confidence and achieve amazing results. We are driven by our passion for success and we are proud to deliver best-in-class payment technology and software solutions. Join our dynamic team and make your mark on the payments technology landscape of tomorrow.
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.
Designing and implementing roadmap features to a high standard within your team
Participating in technical design discussions and contributing to architectural decisions
Improving development processes, methodologies and tools through hands‑on implementation and continuous improvement
Ensuring deliverables are technically accurate, well‑tested and delivered on time
Helping with estimation, planning and communication of progress or issues
Supporting software deployment activities across internal test and production environments
Providing mentorship and guidance to junior engineers through code reviews and pairing
Investigating issues, gathering information from multiple sources and contributing to clear, actionable solutions
Contributing to overall team success by sharing ideas, improving communication and collaborating effectively
Degree in Computer Science or equivalent experience
4+ years of software development experience
Experience with server‑side development in a Windows c# .NET environment
Experience designing and implementing scalable web service solutions
Strong experience with relational databases (SQL Server or related)
Strong experience with Test Automation (unit testing, BDD/SpecFlow)
Experience with CI/CD pipelines (Bamboo, Jenkins, GitLab or similar)
Strong understanding of design patterns, OO design and refactoring practices
Knowledge of software design principles including cohesion, modularity, encapsulation and separation of concerns
Strong analytical, problem‑solving and organisational skills
Proven ability to work as part of a collaborative engineering team
Excellent communication skills
Experience in Agile/Scrum or Lean/Kanban environments
Eligibility to work in the UK on a permanent full‑time basis
Must be resident or within 1 hour commute to Belfast
Knowledge of payment processing or PCI standards
Experience with software usability, system architecture or information security
Global Payments Inc. is an equal opportunity employer. Global Payments provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, sex (including pregnancy), national origin, ancestry, age, marital status, sexual orientation, gender identity or expression, disability, veteran status, genetic information or any other basis protected by law. If you wish to request reasonable accommodations related to applying for employment or provide feedback about the accessibility of this website, please contact jobs@globalpay.com.