Mainframe COBOL Developer
Key ResponsibilitiesCreate, modify, and maintain JCL for batch application execution.
Work with JOB, EXEC, DD, PROC, INCLUDE, and symbolic parameters.
Execute programs using standard utilities such as SORT, IEBGENER, IEBCOPY, and IDCAMS.
Manage input files, output files, temporary datasets, and GDG generations.
Troubleshoot job failures and resolve common system and application abends.
Handle job restarts, checkpoint/restart logic, and rerun procedures.
Analyze job logs and spool output using SDSF.
Monitor batch dependencies and scheduling requirements.
Develop, maintain, and enhance COBOL programs on IBM Mainframe.
Write, debug, and optimize COBOL batch and online applications.
Create and maintain JCL jobs for batch processing.
Work with DB2 SQL queries, tables, cursors, and stored procedures.
Handle VSAM datasets and file processing.
Support CICS online transactions and troubleshoot production issues.
Perform unit testing, integration testing, debugging, and code reviews.
Analyze abends, job failures, and performance issues.
Prepare technical documentation and support deployment activities.
Collaborate with business analysts, QA teams, and production support teams.
Required Technical Skills
COBOL: Programs, file handling, tables, arrays, copybooks, subprograms.
JCL: JOB, EXEC, DD statements, procedures, COND, restart handling.
DB2: Embedded SQL, cursors, joins, SQLCODE troubleshooting.
VSAM: KSDS, ESDS, RRDS, IDCAMS.
CICS: Transactions, maps, COMMAREA/channels (role-dependent).
Mainframe tools: TSO/ISPF, SDSF, Abend-AID or equivalent debugging tools.
SDLC: Requirement analysis, coding, testing, implementation, production support.
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