Senior z/OS Mainframe Programmer / Consultant

GL Global; London; On-site; GBP 60,000 - 100,000; Full time

Job summary

GL Global is seeking experienced z/OS Developers for a new mainframe team focused on critical financial services systems. This role requires strong knowledge in COBOL, JCL, and DB2, and offers an opportunity to shape best practices in an innovative and collaborative environment.

Qualifications

• 3+ years' experience with COBOL, JCL, IMS DB/DC, and DB2.
• Solid knowledge of the IBM z/OS ecosystem.
• Experience with REXX, Assembler, or scripting.

Responsibilities

• Collaborate with engineers and analysts to build secure, high-performing systems.
• Contribute to best practices and team growth in a new mainframe team.

Skills

COBOL

JCL

IMS DB/DC

DB2

IBM z/OS

Agile/Scrum

REXX

Assembler

API enablement

mainframe/cloud integration

Tools

IDz

Endevor

Job description

1 week ago Be among the first 25 applicants

This range is provided by GL Global. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

We're building a brand-new mainframe team for a leading financial services client and are looking for experienced z/OS Developers to join the mission.

This is a fantastic opportunity to shape the direction of a new technical team, working on mission-critical systems, compliance-driven initiatives (e.g. Swift, SIC, FTR), and modernisation efforts.

What You’ll Bring:

• 3+ years' experience with COBOL, JCL, IMS DB/DC, and DB2
• Solid knowledge of the IBM z/OS ecosystem
• Familiarity with tools like IDz, Endevor, or equivalent
• Background in banking or financial services preferred
• Agile/Scrum delivery mindset
• Experience with REXX, Assembler, or scripting
• Knowledge of API enablement or mainframe/cloud integration
• Strong troubleshooting and optimisation skills

You'll collaborate with engineers, analysts, and SMEs to build secure, high-performing systems, while contributing to best practices and team growth.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Information Technology

• Industries

  IT Services and IT Consulting

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