Cobol Developer

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey .

Position: COBOL Code Reading / Writing Expert

Type: Contract

Compensation: $80–$100/hour

Location: Remote

Role Responsibilities

• Read and interpret COBOL programs, copybooks, JCL , and related mainframe code.
• Write clean, correct COBOL code based on technical requirements.
• Debug COBOL logic and identify issues in existing programs.
• Explain code behavior, business logic, and data flow clearly.
• Review AI-generated COBOL solutions for correctness, completeness, and style.
• Provide high-quality feedback to improve AI model performance on legacy code tasks.

Qualifications

Must-Have

• Strong hands-on experience with COBOL development.
• Ability to read and write COBOL code independently.
• Strong debugging and code review skills.
• Clear written communication in English.

Preferred

• Familiarity with mainframe environments such as IBM z/OS .
• Experience with JCL , VSAM , DB2 , CICS , or copybooks.
• Prior experience in banking, insurance, government, or enterprise legacy systems.

Application Process (Takes 20–30 mins to complete)

• Upload resume
• AI interview based on your resume
• Submit form

Resources & Support

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