Sr Mainframe Developer
Contract | Hybrid, Toronto ON | 40 hrs/week | Start: September 25, 2026
We are hiring a Senior Mainframe Developer for a hybrid engagement in downtown Toronto with one of our enterprise consulting clients. This is a hands‑on development role on large, business‑critical mainframe systems, and it suits someone with a deep COBOL background who is comfortable owning design through to production support.
What you will be doing Design, develop and enhance mainframe applications using COBOL, CICS, JCL and DB2
Work across IMS DB/DC and VSAM data structures, including file and database design
Write, unit test and debug programs, and support automated testing on the mainframe
Troubleshoot production issues, tune performance and maintain existing systems
Build and support XML based interfaces and Tibco integrations
Develop and maintain SAS programs and applications where required
Partner with business analysts, QA and downstream teams through the full delivery cycle




What we are looking for 10+ years of hands‑on mainframe development experience
Solid COBOL, CICS, JCL, DB2, VSAM and TSO
IMS DB/DC experience
Mainframe application design experience, not just maintenance
SAS and SAS application development
XML and Tibco
Automation testing on mainframe
Solid debugging skills and the ability to work independently in a large, established codebase
Nice to have Financial services or banking domain experience
Experience modernizing or interfacing mainframe systems with distributed platforms
The details Location: Toronto, ON. Hybrid, onsite at 199 Bay Street.
Type: Contract, 40 hours per week, 12 months
Rate: $58.57/hr on T4
Target start: September 25, 2026
Must be legally eligible to work in Canada. Background check and proof of address required prior to start.
Subcontracting is not permitted on this role.

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📌 Sr Mainframe Developer (Ontario)
🏢 Agility IT
📍 Ontario