Senior zOS Systems Programmer

Global Payments Inc.; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Global Payments Inc. seeks a Senior zOS Systems Programmer to design, develop and support enterprise system services. You will lead upgrades, tune performance and optimise platforms for resilience and scale.

Collaborate with cross-functional teams to deliver secure, reliable solutions and act as a technical mentor to raise engineering standards and automation.

Qualifications

• Extensive systems programming experience in large-scale enterprises.
• Strong understanding of OS, middleware, automation tooling, and performance tuning.
• Proven ability to analyse and resolve complex problems in mission-critical systems.

Responsibilities

• Design, develop, maintain and support critical enterprise systems and platform services.
• Lead system enhancements, upgrades, performance tuning and platform optimisation.
• Troubleshoot production issues, perform root-cause analysis and implement permanent solutions.
• Collaborate with infrastructure, application, architecture and security teams to deliver resilient solutions.
• Mentor engineers and drive standards, automation and operational excellence.

Skills

Systems programming

Operating systems

Middleware

Automation tooling

Performance tuning

Job description

Senior zOS Systems Programmer

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.