Design, develop, and support applications built on IBM mainframe technologies, including batch and online programs. Perform root-cause analysis for production incidents and collaborate with cross-functional teams to ensure application stability and modernization.
Key Responsibilities Design, develop, enhance, test, and support applications built on IBM mainframe technologies.
Develop and maintain batch and online programs using COBOL and/or PL/I with JCL-based scheduling and execution logic.
Work with CICS transaction programs and IMS DC / IMS DB components for online and database processing.
Develop, tune, and troubleshoot DB2-based programs, SQL queries, stored logic, and data access routines.
Support interfaces or reporting solutions involving SQL Server where required in the application ecosystem.
Use REXX and related tooling for automation, utilities, diagnostics, and productivity improvements.
Perform root-cause analysis for production incidents, implement bug fixes, and support release / deployment activities.




Participate in impact analysis, code reviews, unit testing, system testing support, and documentation updates.
Collaborate with business analysts, testers, infrastructure teams, and downstream / upstream application teams.
Contribute to application stability, performance improvements, technical debt reduction, and modernization-readiness activities.
Preferred Skills Exposure to insurance, banking, or other high-volume regulated enterprise environments.
Experience with source control, DevOps / deployment tooling, mainframe utilities, and job scheduling products.
Familiarity with modernization initiatives such as API enablement, data extraction, service integration, or code refactoring.
Knowledge of performance tuning, data reconciliation, and interface support across distributed systems.
Salary Range - CA$ 100,000 - CA$ 120,000 Per Year

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📌 Mainframe Developer (Ontario)
🏢 MainframeMaster
📍 Ontario