Senior Mainframe Developer

About the Role
You will own new feature delivery and production fixes for the cruise-booking engine hosted on IBM z/OS. Beyond hands-on coding, you'll rotate in L3 incident response to restore service quickly.

Key Responsibilities

• Design, code, and unit-test COBOL programs running under CICS TS
• Maintain VSAM files, DB2 schemas, and COMMAREAs/CHANNELs
• Create/modify JCL for nightly fare refresh, reconciliation, and settlement jobs
• Tune SQL, compiler, and LE settings to reduce CPU/MSU costs
• Participate in code promotion via Endevor → future Git/DBB pipelines
• Provide L3 support: dump analysis, root-cause, perm fix
• Produce specs, data-flow diagrams, and release notes

Core Qualifications

• 5+ yrs COBOL on z/OS (3+ yrs in CICS online)
• Strong VSAM, DB2, JCL, TSO/ISPF; debuggers (Debug Tool, Abend-Aid)
• Familiar with service enablement (CICS Web Svcs, z/OS Conn...