Title: Mainframe Developer / Senior Mainframe Engineer Legacy Modernization
Location: Mexico Remote
Engagement: Contract
Experience: 6+ years preferred
Language: English communication required; Spanish preferred
Job Description
Role Overview
We are looking for experienced Mainframe Developers / Senior Mainframe Engineers to support a large-scale legacy modernization initiative. The role requires strong hands‑on IBM Mainframe development experience along with the ability to analyze existing legacy applications, understand business rules and data flows, support modernization/migration activities, and work closely with distributed engineering teams.
Candidates should be comfortable working with mission‑critical applications and handling both batch and online mainframe processing.
Key Responsibilities
- Analyze, maintain, enhance, and modernize existing mainframe applications.
- Develop and support applications using COBOL, JCL, DB2, CICS, and VSAM.
- Analyze legacy code, copybooks, batch jobs, data structures, and business rules.




- Support modernization and migration activities while minimizing impact to existing business operations.
- Create and modify batch programs, online transactions, database components, and interfaces.
- Troubleshoot application, production, and performance issues and perform root‑cause analysis.
- Work with architects and modernization teams to document existing applications and define target‑state solutions.
- Participate in code reviews, unit testing, integration testing, defect resolution, and production support.
- Prepare technical specifications, application flow documentation, and source‑to‑target mappings.
- Collaborate effectively with offshore/onshore development, QA, architecture, and business teams.

Mandatory Skills Recruiters Should Screen for These First
These should be treated as the core screening criteria:
- COBOL strong hands‑on development experience
- JCL batch processing and job execution
- DB2 SQL, data access, troubleshoo

📌 Mainframe Developer (México)
🏢 Connect Tech+Talent
📍 México