System Programmer – Mainframe (Z/Os) Lisboa

System Programmer – Mainframe (Z/Os)
Lisboa
Lisboa, Lisboa, Portugal

Emagine is looking for an experienced System Programmer (z/OS) to join a
- term project with one of our international clients in the insurance sector . This is a strategic opportunity to be part of a release management and infrastructure transformation , contributing to the modernization of core environments and the decommissioning of legacy tooling.

Your main responsibilities:

• Install, configure, and maintain z/OS software and subsystems (DB2, CICS, IMS, RACF, compilers, communication subsystems, etc. ).
• Perform system performance tuning , capacity management, and resource optimization (CPU, memory, I/O).
• Ensure system security and compliance , supporting RACF and other access control mechanisms.
• Support and monitor infrastructure stability and availability , ensuring the mainframe environment is ready for
  - critical applications.
• Collaborate with release management teams to align infrastructure and tooling with modernization initiatives.
• Provide expertise in middleware and operating system components , ensuring smooth integration with applications.
• Contribute to knowledge transfer and documentation for
  - term system sustainability.

You bring:

• Strong background as a System Programmer in mainframe environments (z/OS) .
• Hands-on experience with CICS, DB2, IMS, RACF , and related z/OS subsystems.
• Solid understanding of system installation, configuration, and maintenance processes.
• Expertise in performance tuning, workload optimization, and troubleshooting .
• Knowledge of network and communication layers in mainframe (transport, data link, physical).
• Experience with release management and source control in infrastructure contexts is an advantage.
• Proactive, structured, and
  - oriented approach, with the ability to work independently.
• Fluency in English (spoken and written).