COBOL Developer

COBOL Developer

Adzzat

Job description

About the role

We’re looking for experienced COBOL developers who have built and maintain their own COBOL codebases, public or private. You’ll work with your existing repositories, and the deep knowledge you have of them, to help improve how modern AI systems understand, write, and modernize COBOL. This is a remote, contract / part-time role with flexible hours.

What you’ll do

• Walk through COBOL repositories you’ve authored, explaining program structure, business logic, and design decisions

• Write, review, and debug COBOL programs, including copybooks, JCL, and file handling (VSAM, sequential, indexed)

• Evaluate AI-generated COBOL code for correctness, style, and maintainability, and give clear written feedback

• Create realistic tasks and test cases based on real-world mainframe and batch-processing scenarios

• Document legacy patterns and modernization approaches (e.g., COBOL to Java/C# migration, refactoring monolithic programs)

• Must-haves

• You have created and own at least one meaningful COBOL repository (GitHub, GitLab, Bitbucket, or a private codebase you can speak to in depth)

• 3+ years of hands-on COBOL development

• Strong grasp of COBOL divisions, data structures (PIC clauses, COMP/COMP-3, REDEFINES, OCCURS), and procedural logic

• Experience with JCL and at least one of CICS, DB2, IMS, or VSAM

• Clear written English and the ability to explain code to non-experts

• Nice to have

• Experience with IBM z/OS, Micro Focus COBOL, or GnuCOBOL

• Work in banking, insurance, government, or other mainframe-heavy industries

• Exposure to legacy modernization projects

• Familiarity with a modern language (Java, Python, C#)

• Must-have skills

• COBOLJCLCICS

• Good-to-have skills

• IBM z/OSMicro Focus COBOLGnuCOBOL

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• Adzzat hiring for COBOL Developer