Mainframe Developer

MainframeMaster; Toronto; Hybrid; CAD 100,000 - 120,000; Full time

Job summary

MainframeMaster in Toronto is seeking an experienced designer, developer, and support engineer for applications built on IBM mainframe technologies. You will design, develop, and support COBOL and PL/I batch and online programs, using JCL scheduling, CICS, IMS DC/IMS DB, and DB2.

You will perform root-cause analysis of production incidents, implement bug fixes, and collaborate with business analysts, testers, infrastructure teams, and other application teams to ensure stability, performance, and

Qualifications

• Experience with IBM mainframe technologies and related tools.
• Knowledge of COBOL/PL/I, JCL, CICS, IMS DC/IMS DB, and DB2.
• Familiarity with modernization initiatives and API enablement.
• Experience with performance tuning and data reconciliation in enterprise systems.

Responsibilities

• Design, develop, enhance, test, and support IBM mainframe applications.
• Develop batch and online programs using COBOL and/or PL/I with JCL scheduling.
• Work with CICS, IMS DC/IMS DB for online and database processing.
• Develop, tune, and troubleshoot DB2-based programs and SQL queries.
• Support interfaces or reporting solutions involving SQL Server as needed.
• Use REXX and related tooling for automation and diagnostics.
• Perform root-cause analysis for production incidents and support deployments.
• Collaborate with analysts, testers, and infrastructure teams; document updates.
• Contribute to stability, performance improvements, and modernization readiness.

Skills

COBOL

PL/I

JCL

CICS

IMS DC

IMS DB

DB2

SQL

REXX

DevOps tooling

Mainframe utilities

Tools

Source control

Job scheduling products

Mainframe utilities

DevOps deployment tooling

Job description

Design, develop, and support applications built on IBM mainframe technologies, including batch and online programs. Perform root-cause analysis for production incidents and collaborate with cross-functional teams to ensure application stability and modernization.

Key Responsibilities

• Design, develop, enhance, test, and support applications built on IBM mainframe technologies.
• Develop and maintain batch and online programs using COBOL and/or PL/I with JCL-based scheduling and execution logic.
• Work with CICS transaction programs and IMS DC / IMS DB components for online and database processing.
• Develop, tune, and troubleshoot DB2-based programs, SQL queries, stored logic, and data access routines.
• Support interfaces or reporting solutions involving SQL Server where required in the application ecosystem.
• Use REXX and related tooling for automation, utilities, diagnostics, and productivity improvements.
• Perform root-cause analysis for production incidents, implement bug fixes, and support release / deployment activities.
• Participate in impact analysis, code reviews, unit testing, system testing support, and documentation updates.
• Collaborate with business analysts, testers, infrastructure teams, and downstream / upstream application teams.
• Contribute to application stability, performance improvements, technical debt reduction, and modernization-readiness activities.

Preferred Skills

• Exposure to insurance, banking, or other high-volume regulated enterprise environments.
• Experience with source control, DevOps / deployment tooling, mainframe utilities, and job scheduling products.
• Familiarity with modernization initiatives such as API enablement, data extraction, service integration, or code refactoring.
• Knowledge of performance tuning, data reconciliation, and interface support across distributed systems.

Salary Range - CA$ 100,000 - CA$ 120,000 Per Year