Senior Mainframe Developer

  •  Reference Number: 28252
  •  Job Published: 10 August 2026
  •  Form of employment: Contract
  •  Apply by: 10 September 2026

Job Description

Senior Mainframe Developer

Location: Remote
Start Date: ASAP / Within 1 Month / Flexible

About the Role

Join a team supporting global Trading & Supply operations, focusing on system reliability, automation, modernization, and continuous improvement across business-critical platforms.

Responsibilities

  • Develop and maintain mainframe applications using COBOL, CICS, IMS, JCL, and DB2.
  • Support MQ integrations and middleware solutions.
  • Perform DB2 administration, tuning, and utility management.
  • Participate in migration, upgrade, and modernization initiatives.
  • Create automation solutions using REXX, Python, and z/OSMF workflows.
  • Troubleshoot production issues and collaborate with cross-functional teams.

Requirements

  • Experience with CICS, IMS, and/or MQ integration.
  • Knowledge of DB2 tools (IBM, CA, BMC).
  • Experience with REXX, Python, or z/OSMF workflows.
  • Participation in migration or upgrade projects.
  • Strong analytical and problem-solving skills.

What We Offer

  • Fully remote work
  • Medicover healthcare
  • Multisport card
  • Access to an e-learning platform
  • Group life insurance

Company Description

Experis to światowy lider rekrutacji specjalistów i kadry zarządzającej w kluczowych obszarach IT. Z nami znajdziesz konkurencyjne oferty zatrudnienia oraz ciekawe projekty IT skierowane zarówno do ekspertów z wieloletnim doświadczeniem, jak i osób, które dopiero zaczynają swoją przygodę w branży IT.

We offer recruitment of managers and highly qualified consultants with expertise in IT.Experis is part of ManpowerGroup and has been named one of the world's most ethical companies.
Warszawa, Mazowieckie
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