Junior Mainframe Developer

Key responsibilities :

• Develop and maintain COBOL/JCL programs for VSAM and QSAM data extraction under senior developer guidance.
• Assist in building and executing IDMS data extraction utilities.
• Analyze copybooks, record layouts, and file structures.
• Implement data handling for REDEFINES, packed decimals, and fixed/variable-length records.
• Execute extraction jobs, troubleshoot failures, and validate extracted data.
• Perform record-count reconciliation, field-level verification, and unit testing.
• Prepare technical documentation, data mappings, and execution procedures.
• Support transferring and validating extracted files for Linux application consumption.

Required Skills

• Working knowledge of COBOL, JCL, VSAM, and sequential file processing.
• Basic understanding of CA IDMS or willingness to develop hands-on expertise.
• Knowledge of mainframe record formats, copybooks, and data conversion.
• Good analytical, debugging, and documentation skills.

Expected Deliverables (Both Resources)

• Reusable COBOL/JCL and IDMS data extraction utilities.
• Extracted VSAM, QSAM, and IDMS data in Linux-compatible formats.
• Documented record layouts, field mappings, relationships, and legacy business rules.
• Extraction execution guides, reconciliation reports, and test evidence.
• Technical documentation supporting migration and mainframe decommissioning.