Senior Systems Programmer

United States Digital Space LLC; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

United States Digital Space LLC is seeking a Senior Systems Programmer to join their Mainframe Software Team in Greater London. In this role, you'll design and maintain critical enterprise systems that support the global business operations of a leading payment provider.

The ideal candidate will have extensive systems programming experience and will be capable of tackling complex technical problems. Join a dynamic team that fosters innovation and empowers you to take your career global.

Qualifications

• Extensive experience in systems programming within large-scale enterprise environments.
• Strong knowledge of operating systems, middleware, automation tooling and performance tuning.
• Proven ability to analyse and resolve complex technical problems in mission-critical systems.

Responsibilities

• Design, develop, maintain and support critical enterprise systems.
• Lead software upgrades, performance tuning and optimisation activities.
• Troubleshoot complex production issues and implement permanent solutions.

Skills

Systems programming

Operating systems knowledge

Performance tuning

Stakeholder management

Job description

Ready to take your career global?

Make your mark at one of the biggest names in payments. We’re looking for a Senior Systems Programmer to join our ever evolving Mainframe Software Team and help shape the future of global commerce.

What you’ll own

• Design, develop, maintain and support critical enterprise systems and platform services that underpin Global Payments' business operations.
• Lead system enhancements, software upgrades, performance tuning and platform optimisation activities.
• Troubleshoot complex production issues, perform root‑cause analysis and implement permanent solutions.
• Collaborate with infrastructure, application, architecture and security teams to deliver resilient, scalable and secure solutions.
• Act as a technical mentor and subject matter expert, driving engineering standards, automation and operational excellence.

What you’ll bring

• Extensive experience in systems programming within large‑scale enterprise environments.
• Strong knowledge of operating systems, middleware, automation tooling and performance tuning.
• Proven ability to analyse and resolve complex technical problems in mission‑critical systems.
• Experience supporting highly available production platforms with a focus on reliability and resilience.
• Strong communication and stakeholder management skills with the ability to influence technical and non‑technical audiences.

It’s a bonus if you have

• Experience within payments, fintech or other highly regulated industries.
• Knowledge of cloud platforms, DevOps practices and infrastructure automation.
• Relevant industry certifications and experience with enterprise‑scale modernisation initiatives.

About the team

Our inclusive and global teams win together every day. We’re proud to have the best minds in the industry, who you can learn from as you grow your career. The people, the energy, the connections – it’s unmatched. Come and be part of an ever‑evolving company and get dynamic opportunities that go beyond borders.

What makes a Globalpayer?

Globalpayers think like a client, act like an owner and win as one team. We’re curious and innovative – always finding better ways to deliver impact. We empower each other to make decisions, and it’s our passion that drives excellence in everything we set out to do.

Does this sound like you? Then you sound like a Globalpayer. Apply now to take your career global.

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