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Contract
Debit Card Processing Specialist (Mainframe / Assembler)
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Apex Systems

Debit Card Processing Specialist (Mainframe)

Toronto, ON, Canada

Pay: $45 to $55 USD / hour
Job type: Contract
Apply by: Oct 23, 2026
Experience: 7+ years of relevant experience in technology roles supporting payments or debit systems.
Posting language: English
Posted: Sep 23, 2026

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Original job description

Job#: 3041906

Job Description:

Debit Card Processing Specialist (Mainframe / Assembler)

Apex Systems is a global IT services provider and our staffing practice has an opening for a Debit Card Processing Specialist to place at our client, a top Canadian Bank under the Personal & Business Banking portfolio.

Client: A Top Canadian Bank

LOB : Personal & Business Banking

Terms: 6-monthContract-to-Hire (strong preference to convert the right candidate).

Location: Hybrid 2+ days a week Downtown Toronto

Overview

We’re hiring a Debit Card Processing Specialist to support and enhance a complex debit card processing ecosystem. This role is ideal for an intermediate-level engineer/analyst with strong payments/network knowledge and hands-on mainframe (Assembler) development experience. The focus is on understanding and supporting end-to-end debit transaction flows and contributing to technical analysis and development work in a production-minded environment.

Key Responsibilities

Provide technical analysis and support for the debit card processing ecosystem, including end-to-end transaction flows.
Working with Interac and Mastercard/VISA network processing
Trace, troubleshoot, and explain debit transaction and network flows across systems and rails.
Perform hands-on mainframe development (Assembler) and related system analysis activities.
Support production-oriented investigation and problem-solving efforts (triage/root cause focus).
Work independently on priority assignments while collaborating with cross-functional teams.

Required Qualifications

7+ years of relevant experience in technology roles supporting payments or debit systems.
Strong, practical knowledge of debit card processing and how transactions flow through networks/rails.
Experience with Interac and Mastercard/VISA network processing
Experience with network flows and familiarity with ISO messaging/metrics.
Hands-on mainframe experience, including Assembler development.
Proven ability to work in/around production environments with strong troubleshooting skills.
Strong analytical thinking, attention to detail, and organization skills.
Ability to ramp quickly, be proactive, and take ownership of problems end-to-end.

Preferred / Nice-to-Haves

Experience with Connex (highly valued).
Exposure to TSYS (especially if able to discuss end-to-end transaction processing, not only account-level views).
Broader payments ecosystem knowledge (e.g., familiarity with major debit/credit network concepts).

Engagement Type

Contract-to-hire (strong preference to convert the right candidate).

Must-Haves (Non-Negotiables)

Debit card processing domain expertise

Strong understanding of how debit card processing works , including transaction flows and network/payment rails .

Network experience specific to debit processing

Understanding of network flows and how transactions move across the ecosystem.
Familiarity with ISO messaging/metrics (as referenced in notes).

Hands-on mainframe development experience

Assembler coding experience (hands-on).

Development background is required

Not looking for a pure QA or pure BA profile.

Production experience/exposure

Has supported or worked in/around production environments and understands operational realities.

Experience level

Targeting ~7+ years overall (intermediate “high L6 / L7” type profile).

EEO Employer

Apex is an Equal Employment Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA.

© 2026 Everforth, Inc. All rights reserved.

Everforth Apex Systems is part of the Commercial Segment of Everforth, Inc.

NYSE: EFOR

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Everforth Apex is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex.

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More about this job

Responsibilities

The specialist will provide technical analysis and support for the debit card processing ecosystem, including end-to-end transaction flows. They will perform hands-on mainframe development using Assembler and conduct production-oriented troubleshooting and root cause analysis.

Requirements

Candidates must have 7+ years of experience in technology roles supporting payments or debit systems with hands-on mainframe Assembler development skills. A strong understanding of network flows, ISO messaging, and debit card processing rails is required.

Skills

Mainframe
Assembler
Debit card processing
Interac
Mastercard
Visa
ISO messaging
Transaction flows
Network processing
Technical analysis
Troubleshooting
Payments ecosystem
Connex
TSYS
System analysis
Production support

Benefits

Training program
Certification preparation
Technical and leadership courses
Certification discounts

Visa sponsorship

Not detected in the job text

Keywords

Mainframe
Assembler
Debit card processing
Interac
Mastercard
Visa
ISO messaging
Connex
TSYS
Payments
Network rails
Transaction flows
Production support
System analysis
IT services
Banking
Technical analysis
Troubleshooting
Root cause analysis
Software development

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