Sr. Mainframe Application Engineer, TD Securities

MainframeMaster; Toronto; Hybrid; CAD 105,000 - 129,000; Full time

Job summary

TD Securities offers a Sr. Mainframe Application Engineer position in Toronto to design, develop, deliver, and support high‑volume payment systems across mainframe and distributed components.

The role emphasizes reliability, performance, and security within a large, global technology team. We seek 5+ years in mainframe MVS/TSO/COBOL/JCL with Endevor, CA‑7, MQ and DB2/IMS, and the ability to lead complex initiatives in an Agile environment.

Qualifications

• 5+ years in mainframe MVS, TSO, COBOL, JCL in production environments.
• Hands-on experience with Endevor, CA-7, MQ and DB2/IMS.
• Experience supporting both online and batch mainframe workloads.

Responsibilities

• Design, develop, deliver and support complex payment systems on mainframe and distributed components.
• Lead end-to-end technical work, including planning, coding, testing, and production support.
• Provide technical guidance, mentor junior developers, and collaborate across teams.
• Ensure security, reliability, and operational stability of critical systems.

Skills

Mainframe MVS

TSO

COBOL

JCL

Endevor

CA-7

MQ

DB2

IMS

Agile

Spring

Education

Graduate/Undergraduate Degree in Technology

Tools

Endevor

CA-7

MQ

Job description

# Sr. Mainframe Application Engineer, TD SecuritiesToronto-Dominion Bank (TD)Full-timeToronto, OntarioCAD 105,100 - 129,4000 viewsPosted September 2, 2026## Job DescriptionWork Location:Toronto, Ontario, CanadaHours:37.5Line of Business:Technology SolutionsPay Details:$105,100 - $129,400 CADThis role is eligible for a discretionary variable compensation award that considers business and individual performance.TD is committed to providing fair and equitable compensation opportunities to all colleagues. Growth opportunities and skill development are defining features of the colleague experience at TD. Our compensation policies and practices have been designed to allow colleagues to progress through the salary range over time as they progress in their role. The base pay actually offered may vary based upon the candidate's skills and experience, job-related knowledge, geographic location, and other specific business and organizational needs.As a candidate, you are encouraged to ask compensation related questions and have an open dialogue with your recruiter who can provide you more specific details for this role.Job Description:Department OverviewBuilding a World-Class, Diverse and Inclusive Technology TeamTD Securities offers a wide range of capital markets products and services to corporate, government, and institutional clients who choose us for our innovation, execution, and experience. With more than 6,500 professionals operating out of 40 cities across the globe, we help clients meet their needs today and prepare for tomorrow. Our services include underwriting and distributing new issues, providing trusted advice and industry-leading insight, extending access to global markets, and delivering integrated transaction banking solutions. We are growth-oriented, people-focused, and community-minded. As a team, we work to deliver value for our clients every day.Job Description SummaryDevelops and maintains technical solutions that adhere to engineering and architectural design principles while meeting business requirements. Provides technical expertise with a focus on efficiency, reliability, scalability, and security; includes planning, evaluating, recommending, designing, operationalizing, and supporting solutions in compliance with enterprise and industry standards.Job Description : Senior **Mainframe** Application EngineerAbout This RoleTD Securitiesâ Payments Workflow Technology team is seeking a Senior **Mainframe** Application Engineer to design, develop, deliver, and support solutions aligned with the firmâs technology strategy. The team is responsible for delivering technology solutions across the Payments distributed workflow, spanning both **mainframe** and distributed application components. Responsibilities:- In this role, you will contribute to the creation of endâtoâend technical solutions, with accountability for detailed technical design, development, delivery, and ongoing production support of complex payment systems.- You will work on largeâscale, highâcomplexity, and enterpriseâwide initiatives, taking ownership of sophisticated programming and coding activities across online and batch **mainframe** applications.- We are looking for a seasoned engineer with a strong technical toolkit and a handsâon mindset, capable of developing and maintaining robust solutions that adhere to engineering best practices and architectural standards, while meeting business, regulatory, and operational requirements.- You will provide deep technical expertise with a focus on efficiency, reliability, scalability, security, and operational resilience, supporting applications throughout their full lifecycle â from planning and design through implementation, production support, and continuous improvement.- You will participate in the development of test strategies, test plans, and test cases, and contribute handsâon to testing efforts, including unit testing and integration testing, while supporting higherâlevel testing phases such as SIT , BAT and PAT.- Provide technical support to business and testing teams throughout testing phases, including clarifying design intent, troubleshooting issues, and validating results.- Actively participate in defect management, including defect tracking, triage, root cause analysis, and timely resolution in collaboration with crossâfunctional teams.- This position carries responsibility not only for solution delivery, but also for application stability in production.- You will participate in production support activities, incident investigation, and scheduled onâcall rotations for missionâcritical payment systems, ensuring timely resolution of issues and minimal business impact.- This role can adapt to **Agile** delivery practices, with strong working knowledge of Spring and related frameworks.- At TD, you will be inspired by meaningful work, challenging problems, and a collaborative environment that values technical excellence, accountability, and ownership.## Requirements & SkillsWhat Can You Bring to TD?Your experience matters as much as your credentials. We are looking for a candidate who brings the following:- Graduate/Undergraduate Degree in Technology.- Must have strong skills and 5+ yrs working experience in **mainframe** MVS, **TSO**, **COBOL**, **JCL**, **Mainframe** utilities, Endevor, CA-7, **MQ** and databases such as **DB2** and **IMS** DB/DC.- Extensive handsâon experience with **mainframe** application development, including both online and batch processing in a production environment.- Experience providing application production support, including incident analysis, root cause investigation, defect resolution, and participation in onâcall support rotations for critical systems.- Advanced understanding of business processes, technical environments, standards, controls, and operating procedures, with the ability to apply this knowledge to both development and production support scenarios.- Demonstrated readiness to operate as a senior or lead developer and trusted subject matter expert, independently addressing and resolving highly complex and multifaceted technical issues across development and production.- Recognized subject matter expertise in at least one technical discipline, with experience advising clients, partners, and project teams on research, analysis, solution design, development, testing, deployment, and production support.- Proven ability to lead complex technical initiatives, contribute to comprehensive project planning, and assess risks related to system changes, production stability, and thirdâparty integrations.- Strong coaching and mentoring skills, with the ability to guide junior developers and collaborate effectively with crossâfunctional teams.- High standards for quality, reliability, operational stability, and accountability in delivered solutions.- Excellent analytical, problemâsolving, and troubleshooting skills, particularly in timeâsensitive production scenarios.- Knowledge of Wire payments, SWIFT MT messages, SWIFT ISO MX messages are an asset.