Software Engineer Senior

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. 

Global Payments (NYSE: GPN) is a leading payment technology and software company that powers commerce for businesses of all sizes worldwide. We help businesses grow with confidence by delivering innovative solutions that enable seamless payment acceptance, smarter operations and exceptional client experiences – online, in store and everywhere in between. With our global reach, local expertise and scale, Global Payments manages trillions in payments volume and billions of transactions across more than 175 countries. Headquartered in Atlanta, Georgia, Global Payments is a Fortune 500® company and a member of the S&P 500.

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

• Competitive salary

• Remote first flexible working from our new office in the heart of Belfast city centre or remotely as agreed

• 26 days leave (+ Bank holidays) increasing with length of service

• Medical insurance

• Dental insurance

• Life insurance / income protection / critical illness

• 5% to 8% matching pension contributions and Salary Sacrifice 

• 26 weeks maternity leave

• Cycle to work scheme

• Electric car scheme

• Stock purchase plan

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 [email protected].