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Added 12 mins ago
Senior Quality Assurance Analyst
Mariner
NS
Added 12 mins ago
Senior Quality Assurance Analyst
Mariner
Halifax, NS
Added 12 mins ago
L
Program Manager
LTM
Mississauga, ON
- Full-time
Experience operating in global matrix teams across multiple time zones, with strong presentation, negotiation, conflict-resolution, and senior-stakeholder management skills.
Added 12 mins ago
L
Program Manager
LTM
Mississauga, ON
- $130,000 to $150,000 CAD / year
- Full-time
Experience operating in global matrix teams across multiple time zones, with strong presentation, negotiation, conflict-resolution, and senior-stakeholder management skills.
Added 27 mins ago
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Senior Electrical Engineer
WSP
Thornhill, ON
- Full-time
Join our Buildings M&E team as a Senior Electrical Engineer and help shape electrical solutions for diverse projects across Canada. Based in Thornhill/Markham (GTA), you’ll bring…
Added 27 mins ago
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Senior Mechanical Engineer, Buildings
WSP
Thornhill, ON
- Full-time
Added 41 mins ago
C
Java Software Engineer
Collabera
Mississauga, ON
- $65 to $80 USD / hour
- Full-time
We are looking for a Senior Java Developer with 5 to 10+ years of experience in Java development. The candidate should have strong experience building distributed, service-oriented,…
Added 41 mins ago
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Senior Full Stack Engineer
Viamo
Remote, Canada
- $100,000 to $140,000 CAD / year
- Full-time
- Remote
We are looking for a Senior Full Stack Engineer to join our growing, multinational team of engineers. We work passionately to improve the quality of life for people in lower and middle…
Added 42 mins ago
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Senior Appian Developer
PeoplePilot
Toronto, ON
- Full-time
We are looking for a Senior Appian Developer with 6–8 years of total IT experience to design, develop, and maintain enterprise applications using the Appian low-code platform.
Added 1 hour ago
LC
Sr. Specialist, Quality Assurance, Strategic Initiatives
Loblaw Companies Limited
Brampton, ON
- Full-time
Quality and food safety are central to the trust Canadians place in Loblaw Control Brands. As a Senior Quality Assurance Specialist – Strategic Initiatives, you will be a hands-on technical…
Added 1 hour ago
LC
Sr. Manager, Quality Assurance – Strategic Initiatives
Loblaw Companies Limited
Brampton, ON
- Full-time
Quality and food safety are essential to the trust Canadians place in Loblaw Control Brands. The Senior Manager, Quality Assurance – Strategic Initiatives turns complex, business-critical…
Added 1 hour ago
LC
Sr. Specialist, Quality Assurance, Strategic Initiatives
Loblaw Companies Limited
Brampton, ON
- Full-time
Quality and food safety are central to the trust Canadians place in Loblaw Control Brands. As a Senior Quality Assurance Specialist – Strategic Initiatives, you will be a hands-on technical…
Added 1 hour ago
LC
Sr. Specialist, Quality Assurance, Strategic Initiatives
Loblaw Companies Limited
Brampton, ON
- Full-time
Quality and food safety are central to the trust Canadians place in Loblaw Control Brands. As a Senior Quality Assurance Specialist – Strategic Initiatives, you will be a hands-on technical…
Added 1 hour ago
CD
Development Team Lead
Curio Digital
Canada
- Full-time
Act as the first point of escalation for dev team issues before they reach senior leadership.
Added 1 hour ago
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Quality Manager
Ganotec
Clarington, ON
- Full-time
Added 1 hour ago
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Senior Product Designer
Nascent
Toronto, ON
- Full-time
We’re looking for a Senior Product Designer who owns the design journey from discovery through execution; someone who can take a messy, ambiguous problem and turn it into something clear,…
Added 1 hour ago
AG
Exploration Geologist
Axis Geoscience
Canada
- Full-time
Project Support: Work collaboratively with senior geologists, field personnel, drilling contractors, and client representatives to support safe and efficient exploration programs.
Added 1 hour ago
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Quality Manager
Ganotec
Halifax, NS
- Full-time
Added 1 hour ago
G
Senior Quality Assurance Automation Engineer
GryphTech
Mississauga, ON
- Full-time
Added 1 hour ago
R
Back End Developer
RemitBee™
Mississauga, ON
- $70,000 to $90,000 CAD / year
- Full-time
…supporting data, you're encouraged to bring it directly to senior leadership without hesitation. Every voice matters here, regardless of title or…
Added 1 hour ago
M
RQ11738 - Software Developer - Full Stack - Senior
Maarut
Toronto, ON
- Contract
ministry partners, the Senior Software Developer – Full Stack converts approved
Added 1 hour ago
M
RQ11739 - Software Developer - Full Stack - Senior
Maarut
Toronto, ON
- Contract
ministry partners, the Senior Software Developer – Full Stack converts approved
Added 2 hours ago
BS
Senior Java Developer (FinTech & Payment Technologies)
Brainhunter Systems Ltd
ON · Ontario, Canada
- Contract
Job Role/Title: Senior Java Developer (Banking Applications Development)
Added 2 hours ago
I
Specialist – Technical project integration
Innergex
Longueuil, QC
- Full-time
…Construction Department and provides recommendations to the Senior Director - Construction on technical, contractual, design, commissioning, and operational readiness…
Added 2 hours ago
Q
Senior Test Automation Engineer (French)
Quantiphi
Canada
- Full-time

Global Technical Talent, an Inc. 5000 Company

Senior Mainframe Assembler Programmer

Toronto, ON, Canada

$65 to $80 CAD / hour · Contract

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Job details

Pay: $65 to $80 CAD / hour
Job type: Contract
Apply by: Nov 25, 2026
Posting language: English
Posted: Oct 26, 2026

Original job description

Senior Mainframe Assembler Programmer

Location: Toronto, ON

Onsite Flexibility: Hybrid

Contract Details

Position Type: Contract
Contract Duration: 6 months
Pay Rate: C$65.00–C$80.00 / Hour (CAD)

Job Summary

Our client, a leading Canadian financial institution, is seeking an experienced Senior Mainframe Assembler Programmer to support business-critical banking applications and regulatory technology initiatives. The successful candidate will bring strong hands-on expertise with IBM Assembler / HLASM and deep experience working within enterprise mainframe environments. This role will involve application development, enhancement, testing, production support and technical analysis across complex legacy systems.

Key Responsibilities

Design, develop, test and implement mainframe application enhancements using Assembler / HLASM.
Translate business and technical requirements into detailed design specifications and production-quality code.
Support applications across the full SDLC, from analysis and development through testing, implementation and production support.
Analyze existing mainframe programs and identify required changes, dependencies and downstream impacts.
Troubleshoot complex application issues and perform root-cause analysis.
Work closely with COBOL developers, architects, analysts, QA and infrastructure teams.
Support regulatory and mandatory-change initiatives impacting core banking applications.
Ensure solutions meet enterprise standards for security, performance, resiliency, logging and error handling.

Required Skills

Strong hands-on expertise with IBM Assembler / HLASM.
Experience with z/OS, CICS, JCL, DB2, VSAM and TSO/ISPF.
Good working knowledge of COBOL and integrated mainframe application environments.
Strong debugging, troubleshooting and production-support skills.
Experience delivering changes through structured SDLC environments.
Strong communication and collaboration skills.

Preferred Skills

Previous experience within banking or financial services strongly preferred.
Experience supporting Personal Banking or core deposit applications.
Familiarity with regulatory or compliance-driven technology initiatives.
Experience with mainframe modernization, APIs or z/OS Connect.

Required Experience

5 years of mainframe application development experience.

About GTT

GTT is a minority-owned staffing firm and a subsidiary of Chenega Corporation, a Native American-owned company in Alaska. We highly value diverse and inclusive workplaces and support Fortune 500 organizations across banking, financial services, technology, life sciences, biotech, utilities, and retail sectors throughout the U.S. and Canada.

Job Number: 26-17412 Industry: Software Engineering

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More about this job

Responsibilities

Develop, test, implement, and support enhancements to business-critical mainframe applications using Assembler / HLASM, including analyzing legacy programs and troubleshooting production issues. Collaborate with cross-functional teams to deliver regulatory and other required changes while meeting enterprise standards for security, performance, resiliency, logging, and error handling.

Requirements

Requires at least five years of mainframe application development experience and strong hands-on expertise with IBM Assembler / HLASM. Candidates should have experience with z/OS, CICS, JCL, DB2, VSAM, TSO/ISPF, COBOL, structured SDLC environments, and production support; banking or financial services experience is strongly preferred.

Skills

IBM Assembler / HLASM
z/OS
CICS
JCL
DB2
VSAM
TSO/ISPF
COBOL
Application Debugging
Troubleshooting
Production Support
Root-Cause Analysis
SDLC
Banking Applications
Mainframe Modernization

Visa sponsorship

Not detected in the job text

Keywords

IBM Assembler
HLASM
z/OS
CICS
JCL
DB2
VSAM
TSO/ISPF
COBOL
Mainframe
Application Development
Legacy Systems
Banking Applications
Core Banking
Personal Banking
Core Deposit Applications
SDLC
Application Testing
Production Support
Debugging
Troubleshooting
Root-Cause Analysis
Regulatory Initiatives
Compliance
Mainframe Modernization
APIs
z/OS Connect
Security
Performance
Resiliency

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