United States Digital Space LLC

Senior Mainframe Developer

📍 Location
toronto, on
⏰ Job Type
Full-time
📅 Posted
June 18, 2026
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Job Description

Position Senior Mainframe Developer

Location Toronto, Ontario

Posting Start Date May 20, 2026

Core Technical Requirements

Strong hands‑on experience in COBOL, JCL, DB2, and FOCUS

Experience working in batch processing environments

Hands‑on knowledge of CA‑7 scheduling

Strong understanding of flat files and dataset‑based processing environments

Capability to analyze and interpret legacy/custom‑developed programs, including:

Understanding program logic and workflows

Identifying data flows and dependencies

Supporting maintainability and system documentation

Key Expectations

Ability to independently review and assess existing mainframe codebase

Strong analytical skills to decode and document legacy systems

Prior experience in onsite lead roles, managing and guiding offshore teams

Nice to Have

Exposure to GIT / GitLab

Experience wi...

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