Full-time

Senior Software Developer for Mainframe Solutions

Posted by Source Code • toronto, on, Canada

📍 toronto, on 🕒 June 01, 2026

About the Role

Become a Senior Software Developer in a contract role focused on Back End solutions for mainframe systems. This position requires in-depth analysis and innovative coding practices.

In this Senior Software Developer role, your contributions will shape the integration of new systems and updates to existing designs. You will work closely with technical teams, documenting changes, and ensuring adherence to operational standards throughout the development lifecycle. Regular reporting and knowledge transfer to team members are essential parts of your responsibilities.

Key Responsibilities: • Conduct analysis for system logical and physical design • Create technical specifications per OPS standards • Participate in design validation and JAD sessions • Develop and modify mainframe code as needed • Oversee testing phases including integration processes

Requirements: • 5+ years of experience with mainframe PL/I transactions • Hands-on experience with z/OS V2.2 and IMS ...

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