Remote COBOL/Mainframe Expert for AI Data & Modernization

YO AI Labs; Los Angeles (CA); Remote; USD 120,000 - 150,000; Part time

Job summary

YO AI Labs is seeking experienced COBOL Developers for remote collaboration on a high-impact AI training project. You will apply deep COBOL knowledge, mainframe experience, and legacy system expertise to analyze code, document business logic, and provide expert feedback.

No AI background required; COBOL and mainframe mastery is the focus. You will annotate scripts, design test scenarios, and guide modernization efforts in distributed teams.

Qualifications

• Proven professional experience as a COBOL Developer or Mainframe Developer.
• Strong proficiency in COBOL programming and legacy application environments.
• Experience working with mainframe systems and related technologies.
• Strong understanding of complex legacy codebases, business rules, and system workflows.
• Excellent analytical and problem-solving skills.
• Ability to explain complex technical concepts clearly and accurately.
• Strong technical writing and documentation skills.
• Exceptional attention to detail.
• Ability to work independently and manage multiple deliverables in a remote environment.

Responsibilities

• Analyze and interpret existing COBOL codebases, workflows, and business logic.
• Develop clear and accurate documentation of COBOL programs, system processes, and technical requirements.
• Review and evaluate COBOL code, pseudocode, and project scenarios for accuracy and completeness.
• Identify edge cases, ambiguities, potential defects, and areas requiring clarification.
• Annotate COBOL scripts and technical content to support the development of high-quality AI training datasets.
• Design and review test cases and scenarios representing real-world COBOL and mainframe applications.
• Provide expert guidance on legacy system architecture, integrations, and dependencies.
• Collaborate with project coordinators and technical experts through clear written and verbal communication.
• Ensure all submitted technical materials meet high standards of accuracy, consistency, and completeness.
• Support projects involving legacy-system modernization, migration, integration, or transformation where applicable.

Skills

COBOL

Mainframe Development

Legacy Systems

JCL

DB2

CICS

VSAM

Code Analysis

Technical Documentation

Business Logic Analysis

Test Case Design

Problem Solving

Attention to Detail

Technical Communication

Remote Collaboration

Tools

JCL

DB2

CICS

VSAM

Job description

YO AI Labs is seeking experienced COBOL Developers for remote collaboration on a high-impact AI training project. You will apply deep COBOL knowledge, mainframe experience, and legacy system expertise to analyze code, document business logic, and provide expert feedback.

No AI background required; COBOL and mainframe mastery is the focus. You will annotate scripts, design test scenarios, and guide modernization efforts in distributed teams.