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J&M Group

Senior Developer - Mainframe

Toronto, ON, Canada

Contract

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Job details

Job type: Contract
Apply by: Apr 26, 2027
Posting language: English
Posted: Oct 28, 2026

Original job description

As a Senior Developer, you will be working in a development and support capacity on our core mainframe cards and transactions system.

The core application is a large, sophisticated mainframe-based system which connects clients to their banking products and services.

This 24/7 application supports critical delivery channels such as Online Banking, POS, ATM and others.

What you will do?

Design, develop, test, deploy, support and evolve software to deliver banking services.
Lead conversion, attestation and audit initiatives
Manage individual priorities, deadlines and deliverables.
Assess and analyze business and technical requirements in order to provide estimates and establish plans and timelines
Create, update and contribute to critical documentation relevant to the projects
Effectively communicate and build rapport with team members and various IT partners
Available for after-hours production support when needed (rare)

What do you need to succeed?

Must-have

Expertise in COBOL, JCL, IMS (DB/Online/Batch), DB2, MQSeries, Git/Endevor and Zeke
Completion of a post-secondary education
Production Support Experience.
Outstanding communication skills (written and verbal)
Strong background in software Maintenance especially mainframe

Nice-to-have

Understanding/usage of z/OS Connect, IDz, zUnit and test automation
Experience with CI/CD mainframe pipeline
Familiarity with Java Cloud development

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More about this job

Responsibilities

Design, develop, test, deploy, support, and evolve software for a critical banking cards and transactions system. Lead conversion, attestation, and audit initiatives; manage deliverables and timelines; maintain project documentation; collaborate with IT partners; and provide occasional after-hours production support.

Requirements

Requires expertise in COBOL, JCL, IMS, DB2, MQSeries, Git or Endevor, and Zeke, along with post-secondary education and production support experience. Strong communication skills and a background in mainframe software maintenance are required; experience with z/OS Connect, IDz, zUnit, test automation, CI/CD pipelines, Java, or cloud development is an asset.

Skills

COBOL
JCL
IMS
DB2
MQSeries
Git
Endevor
Zeke
Production Support
Software Development
Testing
Deployment
Business and Technical Requirements Analysis
Communication
Documentation

Visa sponsorship

Not detected in the job text

Keywords

COBOL
JCL
IMS
DB2
MQSeries
Git
Endevor
Zeke
z/OS Connect
IDz
zUnit
Test Automation
CI/CD
Java
Cloud Development
Mainframe
Banking
Cards and Transactions
Online Banking
POS
ATM
Production Support
Software Maintenance
Conversion
Attestation
Audit
Requirements Analysis
Software Development
Deployment
Documentation

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