Senior Mainframe Developer

Evolvus Solutions Pvt Ltd; Malaysia; On-site; MYR 100,000 - 180,000; Full time

Job summary

Evolvus Solutions Pvt Ltd is seeking an experienced specialist to analyze and extract data from legacy COBOL systems, including IDMS databases, using JCL, VSAM, and related technologies. The role focuses on designing robust extraction utilities, handling complex COBOL structures, and delivering Linux-friendly data formats.

You will document mappings, validate data, and mentor junior developers while supporting end-to-end testing of extraction processes.

Qualifications

• Experience in COBOL, JCL, VSAM, QSAM, and CA IDMS (CV/IDMS).
• Understanding of IDMS schema, subschema, DML, and database relationships.
• Experience with legacy data extraction and mainframe-to-Linux integration.
• Strong troubleshooting and documentation skills.

Responsibilities

• Analyze COBOL programs, copybooks, JCL, VSAM, QSAM, and CA IDMS to understand legacy data and logic.
• Design and develop COBOL programs and mainframe utilities to extract data from VSAM, QSAM, and IDMS.
• Develop IDMS extraction utilities handling complex relationships and multiple record types.
• Handle COBOL structures: REDEFINES, OCCURS, OCCURS DEPENDING ON, COMP-3, and variable-length records.
• Create extraction formats for Linux apps; convert data from EBCDIC to ASCII/UTF-8.
• Document field mappings, record layouts, rules, relationships, and transformation logic.
• Define extraction validation, reconciliation, and control mechanisms for data completeness and accuracy.
• Provide technical guidance to juniors and support end-to-end testing.

Skills

COBOL

JCL

VSAM

QSAM

CA IDMS

Job description

Role & responsibilities:

• Analyze existing COBOL programs, copybooks, JCL, VSAM, QSAM, and CA IDMS databases to understand legacy data structures and business logic.
• Design and develop COBOL programs and mainframe utilities to extract data from VSAM, QSAM, and IDMS.
• Develop IDMS extraction utilities capable of handling complex database relationships, multiple record types, and set-based relationships.
• Handle complex COBOL structures, including REDEFINES, OCCURS, OCCURS DEPENDING ON, COMP-3, and variable-length records.
• Design extraction formats suitable for consumption by Linux-based applications, including data conversion from EBCDIC to ASCII/UTF-8 where required.
• Document field mappings, record layouts, business rules, relationships, and transformation logic.
• Define extraction validation, reconciliation, and control mechanisms to ensure data completeness and accuracy.
• Provide technical guidance to the junior developer and support end-to-end testing.

Required Skills:

• Strong hands-on experience in COBOL, JCL, VSAM, QSAM, and CA IDMS (CV/IDMS).
• Good understanding of IDMS schema, subschema, DML, and database relationships.
• Experience with legacy data extraction, file formats, and mainframe-to-Linux integration.
• Strong troubleshooting, reverse engineering, and technical documentation skills.