Mainframe Developer

Description du poste

Skillset: Mainframes – Cobol, DB2, JCL, VSAM, CICS

Core Mainframe Fundamentals

MUST HAVE:

• JCL: job setup, PROC/INCLUDE, condition codes, overrides, restart/rerun, dataset management.
• COBOL: file/DB I/O, modularization, error handling, copybook usage, working storage vs linkage, performance considerations.
• DB2: SQL (joins, correlated subqueries), embedded SQL in COBOL, bind/plan/package basics, commits/rollbacks, performance (indexes, access paths).
• CICS (where applicable): pseudo‑conversational design, COMMAREA/Channels & Containers, MAP/MAPSET, task initiation/termination, error handling.

Mainframe Job Description

Key Responsibilities

• Application Development & Maintenance Design, develop, and enhance mainframe applications using COBOL, JCL, DB2, CICS, VSAM, and other IBM mainframe tools.
• Maintain and optimize existing code to improve performance, reliability, and scalability.
• Conduct root-cause analysis and resolve production issues within SLAs.
• Systems Analysis & Design: Analyze business requirements and translate them into technical specifications.
• Participate in architecture and design discussions for new modules and system enhancements.
• Work with cross-functional teams to ensure seamless integration of mainframe components.
• Testing & Quality Assurance: Develop and execute unit, integration, and regression test cases.
• Support QA teams in test planning and defect resolution.
• Ensure compliance with coding standards, documentation, and audit requirements.
• Production Support: Provide L2/L3 support for critical mainframe applications.
• Monitor batch jobs and troubleshoot job failures and data issues.
• Participate in on-call rotation for production support (if required).
• Collaboration & Documentation: Work closely with business analysts, testers, and project managers to deliver high‑quality solutions.
• Prepare and maintain technical documentation, including design specs, data flow diagrams, and operational procedures.
• Participate in peer reviews to ensure code quality and knowledge sharing.

Technical Skills

Strong experience with:

• COBOL (COBOL/370, COBOL II)
• JCL (Job Control Language)
• DB2 / SQL
• CICS / IMS
• VSAM
• Batch and online processing

Hands-on experience with:

• FileAid, Expeditor, Abend-AID, Changeman/Endevor, REXX scripts (optional) Familiarity with mainframe modernization tools or cloud migration (nice-to-have).