COBOL Mainframe Developer - Remote
Summary: The role of COBOL Mainframe Developer involves working remotely to develop, debug, and evaluate COBOL code, particularly in the context of AI model training on legacy software engineering workflows. Candidates are expected to possess strong COBOL skills and experience with mainframe environments, contributing to the improvement of AI systems focused on legacy code. The position requires clear communication and the ability to explain complex code behavior to diverse audiences. Ideal candidates will have practical experience with real-world COBOL systems and a background in enterprise legacy systems.
Key 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.
- Create or evaluate test cases for COBOL programs.
- Provide high-quality feedback to improve AI model performance on legacy code tasks.
Key Skills:
- Strong hands-on experience with COBOL development.
- Ability to read and write COBOL code independently.
- Familiarity with mainframe environments such as IBM z/OS is preferred.
- Experience with JCL, VSAM, DB2, CICS, or copybooks is a plus.
- Strong debugging and code review skills.
- Clear written communication in English.
- Prior experience in banking, insurance, government, or enterprise legacy systems is a plus.
Salary (Rate): £130.00/hr
City: undetermined
Country: United Kingdom
Working Arrangements: remote
IR35 Status: undetermined
Seniority Level: undetermined
Industry: IT
Job Type: Contractor
Location: Remote
Job Overview
We are looking for experienced COBOL developers who can read, understand, debug, and write production-quality COBOL code. You will work on tasks that help train and evaluate AI models on legacy software engineering workflows, especially mainframe-style codebases.
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.
- Create or evaluate test cases for COBOL programs.
- Provide high-quality feedback to improve AI model performance on legacy code tasks.
Requirements
- Strong hands-on experience with COBOL development.
- Ability to read and write COBOL code independently.
- Familiarity with mainframe environments such as IBM z/OS is preferred.
- Experience with JCL, VSAM, DB2, CICS, or copybooks is a plus.
- Strong debugging and code review skills.
- Clear written communication in English.
- Prior experience in banking, insurance, government, or enterprise legacy systems is a plus.
Ideal Candidate
- Has worked on real-world COBOL systems, not just academic examples.
- Can explain legacy code clearly to both technical and non-technical audiences.
- Is comfortable evaluating code quality and reasoning through edge cases.
- Has experience maintaining or modernising large legacy codebases.
Why Join
- Contribute to cutting-edge AI systems focused on software engineering.
- Help models better understand and support legacy enterprise code.
- Work on intellectually engaging code evaluation and generation tasks.
- Flexible opportunity for experienced COBOL engineers.
We consider all qualified applicants without regard to legally protected characteristics and provide reasonable accommodations upon request.
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