Full-time

Lead/Senior Mainframe Developer (Assembler)

Posted by Apex Systems • Toronto, ON, Canada

📍 Toronto, ON 🕒 February 25, 2026

About the Role

Lead / Senior Mainframe Developer

Job #:

Client & LOB

Client: Top Canadian Bank
LOB: Personal & Business Banking

Terms & Location

Terms: 6‑month contract, subject to extension (multi‑year)
Location: Hybrid; 2+ days per week in Downtown Toronto

Specific Functions

  • Lead projects through all SDLC stages, coaching junior staff and ensuring the bank’s coding standards are maintained
  • Work on complex projects impacting core banking operations
  • Provide senior‑level technical analysis and support for end‑to‑end project teams
  • Support on‑call as needed

Qualifications

  • In‑depth knowledge of core banking processing and mainframe technologies
  • 10–15+ years of system design, analysis and mainframe programming experience
  • Knowledge of assembler, CICS and DB2 are assets
  • Strong analytical skills for complex prob...

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