Mainframe Developer

Roles & responsibilities

• Develop, enhance, maintain, and support mainframe applications using COBOL.
• Write, modify, and execute JCL (Job Control Language) for batch processing, job scheduling, and production workloads.
• Design, access, and maintain VSAM datasets, including KSDS, ESDS, and RRDS.
• Develop and optimize DB2 SQL queries, including SELECT, INSERT, UPDATE, and DELETE operations.
• Work with DB2 tables, indexes, primary keys, foreign keys, and referential integrity.
• Perform batch job monitoring, troubleshooting, and resolution of abends and production failures.
• Analyze existing programs, understand business requirements, and implement application enhancements.
• Perform unit testing, integration testing, regression testing, and defect fixing.
• Debug COBOL programs using tools such as Abend-AID, Xpediter, or Fault Analyzer, where available.
• Analyze job logs, spool outputs, return codes, and system messages to identify issues.
• Optimize COBOL programs, JCL jobs, and DB2 queries to improve application performance.
• Participate in code reviews, technical documentation, release management, and deployment activities.
• Collaborate with business analysts, QA teams, production support teams, and other developers.
• Follow coding standards, change management procedures, and production release guidelines.

Preferred candidate profile

• COBOL programming
• JCL (Job Control Language)
• VSAM file handling
• DB2 and SQL
• IBM z/OS mainframe environment
• TSO/ISPF and SDSF
• Batch processing and job scheduling
• COBOL debugging and abend analysis
• Mainframe utilities (SORT, IDCAMS)
• DB2 cursors, joins, and embedded SQL