Mainframe System Programming / CICS / MQ / ZOS

Mainframe System Programmer / Senior System Programmer (7+ years)

Bengaluru, Karnataka, India (Onsite / Hybrid as applicable)

Full‑time

Responsible for the planning, installation, configuration, maintenance, and performance tuning of IBM Mainframe / z/OS operating systems and associated subsystems, ensuring high availability, reliability, security, and efficient resource utilization. Acts as a technical expert, problem solver, and mentor in the Mainframe infrastructure domain.

• Install, configure, upgrade, and maintain z/OS operating systems, PTFs/hotfixes, and related ISV (Independent Software Vendor) products.
• Manage system software lifecycle using SMP/E or equivalent tools.
• Perform system customization: PARMLIB, JES2 / JES3 configurations, catalog management.
• Administer key subsystems: RACF (security), VTAM / TCPIP / NetView, Workload Manager (WLM), logging / journaling, system dumps.
• Performance monitoring & tuning: using tools like RMF, SMF, RMF, SYSVIEW etc. Identify bottlenecks, resource constraints and implement optimizations.
• Capacity planning: monitor resource usage, plan for growth, forecast capacity needs (CPU, memory, I/O).
• Troubleshooting & root cause analysis of system failures or performance issues (hardware / storage / network / software).
• Participate in Disaster Recovery planning and execution (DR drills, fallback, recovery scenario validation).
• On‑call support / shift rotations for system outages, escalations.
• Automation: scripting (REXX, CLIST), batch job automation, possibly Unix System Services (USS) work.
• Work closely with application teams, operations, storage/network teams for end-to-end stability of mainframe environment.
• Ensure compliance with security, audit, change management policies.
• Mentor junior system programmers / team members.

• Bachelor’s degree in Computer Science, Engineering, or equivalent.
• Minimum 7+ years experience in Mainframe system programming / administration, especially on IBM z/OS.
• Strong expertise with tools/technologies including:
• z/OS architecture & internals
• SMP/E
• Job Control Language (JCL)
• PARMLIB, JES2 (or JES3)
• SMF, RMF, performance tuning tools
• RACF (or another mainframe security product)
• TCP/IP / VTAM / NetView (networking aspects on MF)
• Unix System Services (USS)
• Scripting (REXX / CLIST)
• Experience with ISV products commonly used on mainframe (CICS, DB2, MQ, etc.) is a plus.
• Hands‑on experience in system upgrades / migrations, applying PTFs, dealing with patches / maintenance.
• Strong troubleshooting skills; experience with incident / problem / change management.
• Excellent communication (verbal & written) and ability to work with cross‑functional teams.
• Willingness to participate in after‑hours support / shift work.

• Experience with Parallel Sysplex / GDPS / Sysplex environments.
• Experience with automation / infrastructure as code, monitoring dashboards, etc.
• Knowledge of mainframe hardware configurations & I/O subsystem tuning.
• Prior exposure to DR solutions, tape / storage management (ATL/VTL etc).
• Experience in the Banking / Financial services domain or other critical operations sectors.
• Certifications in mainframe technologies (IBM, etc).