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We are seeking an experienced z/OS Mainframe Systems Programmer to join our enterprise infrastructure team. This role is responsible for the installation, upgrade, maintenance, and support of the IBM z/OS operating system and a broad range of ISV products, primarily from IBM and Computer Associates (CA/Broadcom). The adecuado candidate will possess deep technical expertise in z/OS Systems Programming, strong Parallel Sysplex administration skills, and extensive experience working within large-scale, mission-critical environments such as banking and financial services organizations. The successful candidate will be a self-starter who can work independently, troubleshoot complex technical issues, and contribute effectively from day one. This position requires excellent communication skills, strong analytical thinking, collaboration with cross-functional teams, and participation in planned after-hours activities related to system upgrades, maintenance, and implementations.

In this role, You will

- Install, configure, customize, upgrade, and maintain IBM z/OS operating systems.
- Manage and support IBM and CA/Broadcom system software products across enterprise environments.
- Plan and execute operating system upgrades and software maintenance activities using SMP/E.
- Administer and support large-scale Parallel Sysplex environments to ensure high availability and performance.




- Perform system performance monitoring, capacity planning, and resource optimization.
- Analyse and resolve complex system-level issues involving z/OS, middleware, and infrastructure components.
- Work closely with application support, infrastructure, security, and operations teams to ensure platform stability.
- Implement software maintenance, fixes, service packs, and vendor-recommended updates.
- Support disaster recovery, business continuity, and high-availability initiatives.
- Maintain system security controls and ensure compliance with organizational standards.
- Create and maintain technical documentation, procedures, and operational runbooks.
- Participate in root cause analysis and problem management activities.
- Provide technical guidance and mentoring to junior team members.
- Support production implementations and planned maintenance activities, including off-hours and weekend work when required.

Required Qualifications
- 10+ years of hands-on experience in z/OS Systems Programming.
- Deep knowledge of: z/OS Operating System SMP/E TSO/ISPF UNIX System Services (USS) SDSF JCL RACF
- Strong expertise in Parallel Sysplex implementation and support as well as Parallel Sysplex architecture and administration
- Extensive experience installing, configuring, customizing, supporting and maintaining multiple IBM and CA/Broadcom mainframe products.
- Experience working in large enterprise environments, preferably within Banking or Financial Services.
- Strong troubleshooting and problem-solving capabilities.




- Ability to independently manage complex technical assignments.
- Excellent verbal and written communication skills.
- Experience supporting mission-critical production environments with stringent SLA requirements.

Desired Qualifications
- Experience with ACF2 Security Administration.
- Knowledge of GDPS (Geographically Dispersed Parallel Sysplex) environments.
- Working knowledge of: Assembler REXX OMEGAMON RMF SMF SAS
- Experience with automation and operational tooling in mainframe environments.
- Understanding of disaster recovery and high-availability architectures.
- Exposure to hybrid infrastructure environments and modernization initiatives.
- Industry certifications related to IBM Z Platforms or Mainframe Systems Programming are desirable.

Job Expectations
- Deliver stable, secure, and highly available mainframe infrastructure services.
- Participate in change management, release management, and implementation activities.
- Provide on-call and after-hours support for critical production changes and incident resolution.
- Ensure adherence to enterprise security, compliance, and operational standards.
- Collaborate with global teams and stakeholders across infrastructure, applications, and business units.
- Drive continuous improvement initiatives focused on system reliability, performance, and automation.
- Maintain thorough documentation of system configurations, procedures, and technical implementations.
- Demonstrate ownership, accountability, and a proactive approach to issue resolution. xcskxlj
- Act as a trusted technical expert for z/OS platform services and system software products.

Primary Skillset
- z/OS
- SMP/E
- TSO/ISPF
- USS (UNIX System Services)
- SDSF
- JCL
- RACF
- Parallel Sysplex
- Installation, customization, and support of IBM and CA/Broadcom products

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📌 z/OS Mainframe Systems Programmer (Barcelona)
🏢 Nttlimited
📍 Barcelona