Tata Consultancy Services Canada Inc. is hiring a Mainframe Developer to contribute across core IBM mainframe technologies. You will work on JCL, PL/I, COBOL, CICS, IMS DC/DB, DB2, SQL Server, and REXX, handling enhancement, maintenance, incident resolution and modernization tasks. The role requires hands-on experience in batch and online processing, debugging, and collaboration with cross-functional teams. Toronto-based, full time position with a focus on reliability and performance.