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Mercor

COBOL Programming Expert

Location: RemoteContract type: ContractSalary: $100 – $200Posted: July 28, 2026

About the Role

A leading AI research organization is evaluating how advanced AI systems perform in specialized engineering domains, and is seeking expert engineers with deep, hands-on production experience in COBOL. The immediate focus is a benchmark of roughly 100 tasks centered on database migration in COBOL — you'll apply your mainframe expertise to assess complex, real-world technical scenarios and directly shape how cutting-edge AI performs on mainframe systems.

What You'll Do

  • Apply your language expertise to evaluate technical tasks against real-world professional standards
  • Review intricate code-level situations — including database migration scenarios — and provide precise, structured written assessments
  • Provide clear written rationales explaining your expert judgments
  • Complete well-defined, time-bounded tasks with explicit evaluation criteria

Requirements

  • 5+ years of professional COBOL development — IBM mainframe (z/OS) production work; JCL, CICS, VSAM, DB2; banking, insurance, or government systems
  • Demonstrated project, professional, or research experience in one of the following supplemental languages: Rust, C++, Java, Kotlin/JVM, Python
  • Experience with financial system backends (e.g., banking, insurance) is a strong plus, especially anything touching data or database migration work
  • Ability to articulate not just what code does but why it's correct or idiomatic, clearly in writing
  • Welcomed: practitioners from banking, insurance, or government backgrounds; non-traditional digital footprints are fine — a GitHub profile is not required

Why This Work Matters

COBOL runs critical infrastructure in global banking, insurance, and government systems, yet remains among the least-represented domains in AI research. The expertise you bring is rare, and your assessments directly influence how AI systems learn to operate in it.

Compensation & Logistics

  • Type: Independent Contractor (one-week sprint)
  • Compensation: $100–200/hour, based on depth and experience
  • Location: Remote (no mainframe access needed)
  • Engagement: A one-week sprint — a 2–3 day pilot, iteration on the production task set, then roughly a week of production work. Kickoff is targeted for the coming Friday; we need experts who can stay highly engaged throughout. No proprietary tooling required.
  • Application Process: Submit your resume or relevant technical background. Qualified applicants may be asked to complete a brief technical assessment or submit additional information. Applications are reviewed on a rolling basis.