Mainframe Development Jobs in Ontario (NOW HIRING)

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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:

The Senior Mainframe Developer is responsible for the design, development, modernization, and support of critical applications within Core Investment Management (Core IM). The role involves delivering secure and reliable mainframe solutions, supporting complex batch processing, production stability, regulatory requirements, and ongoing technology improvements.

Responsibilities:

• Produce high-quality functional and technical designs for Core Investment Management and the RIO (Registered Income Options) application.
• Participate in complex application and systems development, project planning, estimation, programming, testing, implementation, and status reporting to ensure deliverables are completed on time and meet corporate quality and security standards.
• Translate business, Enterprise Architecture, system performance, regulatory, and development-standard requirements into maintainable RIO mainframe solutions.
• Design, develop, enhance, and support COBOL, JCL, IMS DB/DC and/or DB2 components, VSAM files, datasets, copybooks, control cards, utilities, and batch processes.
• Analyze RIO job flows, data dependencies, and upstream and downstream interfaces, including file-based and mailbox integrations with internal applications and external service providers.
• Conduct code reviews to address quality, standards compliance, security, reusability, performance, and ease of maintenance; support Operational Readiness Reviews, gating, and solution sign-offs.
• Complete unit, integration, SIT/PAT, and end-to-end testing in accordance with standards and design specifications; investigate defects and provide evidence for release readiness.
• Troubleshoot production incidents, job abends, data issues, and service interruptions; perform impact and root-cause analysis, implement remediation, and facilitate stakeholder communication.
• Participate in change governance, implementation and rollback planning, peer review, production validation, incident management, problem management, and planned on-call support.
• Contribute to RIO application stewardship activities, including application currency, vulnerability remediation, access controls, audit/SOX evidence, TARA/TDAR updates, data retention, disaster recovery, and regulatory obligations.
• Maintain technical documentation, runbooks, job-flow diagrams, interface inventories, operational procedures, and knowledge-transfer material.
• Collaborate with developers, QEs, BSAs, product partners, architecture, operations, risk, support teams, and vendors; identify risks and dependencies early and drive them to closure.
• Contribute to Core IM and RIO mainframe modernization initiatives while maintaining the stability, security, and governance of a critical banking application.
• Advance modern mainframe development using Git, GitHub, VS Code, Code4z/Zowe, Endevor Bridge for Git, branch and pull-request workflows, and hybrid Git/Endevor engineering practices.
• Help establish and enhance the Endevor-to-Git CI pipeline for RIO, including repository onboarding, source synchronization, Endevor compilation, automated quality checks, and security scanning using available enterprise capabilities.
• Use GitHub Copilot responsibly in approved environments to assist with COBOL/JCL code understanding, impact analysis, documentation, code generation and refactoring, unit-test design, defect analysis, and knowledge transfer.
• Validate all GitHub Copilot-generated or AI-assisted output through developer review, approved coding standards, testing, security controls, and established change-management processes.
• Promote code explainability, dependency analysis, automated testing, modern debugging, reusable engineering patterns, technical-debt reduction, and measurable improvements to the mainframe developer experience.

Job Requirements:

• Undergraduate Degree, Technical Certificate, or equivalent combination of education and experience.
• 6+ years of mainframe application design, development, implementation, and production support experience (financial industry preferred).
• Working experience with mainframe technologies and complex batch-oriented applications.

Must have

• COBOL, JCL, VSAM, TSO, ISPF, IMS DC/DB and/or DB2.
• Source control and deployment experience with Endevor or a comparable mainframe tool such as SCM or Changeman.
• Job scheduling experience with CA-7, Autosys, AWF, or a comparable workload automation tool.
• Experience analyzing batch failures, job output, datasets, interfaces, and cross-application impacts.
• Experience with secure coding, code review, unit and integration testing, change management, incident management, and production support.
• Strong communication, documentation, collaboration, and problem-solving skills.

Should have

• Agile delivery experience.
• ITSM and collaboration tools: Jira, Confluence, and ServiceNow.
• Experience contributing to mainframe modernization, automation, modern debugging, technical-debt reduction, or developer-productivity initiatives.

Nice to have

• Experience with Git, GitHub, branch and pull-request workflows, and CI/CD or DevSecOps practices.
• Experience with Endevor Bridge for Git, Explorer for Endevor, VS Code, and Code4z/Zowe.
• Experience using GitHub Copilot for legacy-code analysis, documentation, code assistance, test generation, defect analysis, or refactoring, with appropriate developer validation.
• Exposure to automated code-quality and security scanning tools such as SonarQube and Veracode.
• General knowledge of IBM MQ, SAS on z/OS, ACF2, and secure file-transfer or mailbox integrations.
• Knowledge of registered investment products or processing
• Experience with application ownership, audit/SOX evidence, technology risk, data retention, resiliency, and disaster-recovery activities.
• Banking industry experience.

Who We Are:

TD is one of the world's leading global financial institutions and is the fifth largest bank in North America by branches/stores. Every day, we strive to make every interaction, product, and experience remarkably human and refreshingly simple for over 27 million households and businesses in Canada, the United States and around the world. More than 95,000 TD colleagues bring their skills, talent, and creativity to foster deeper relationships, ensure disciplined execution, and build a simpler, faster banking experience. TD is deeply committed to being a leader in client experience, that is why we believe that all colleagues, no matter where they work, are client facing. Together, we are reimagining what banking can be for our clients, colleagues and communities.

Our Total Rewards Package
Our Total Rewards package reflects the investments we make in our colleagues to help them and their families achieve their financial, physical, and mental well-being goals. Total Rewards at TD includes a base salary, variable compensation, and several other key plans such as health and well-being benefits, savings and retirement programs, paid time off, banking benefits and discounts, career development, and reward and recognition programs. Learn more

Additional Information:
We're delighted that you're considering building a career with TD. Through regular development conversations, training programs, and a competitive benefits plan, we're committed to providing the support our colleagues need to thrive both at work and at home.

Please be advised that this job opportunity is subject to provincial regulation for employment purposes. It is imperative to acknowledge that each province or territory within the jurisdiction of Canada may have its own set of regulations, requirements.

Colleague Development

If you're interested in a specific career path or are looking to build certain skills, we want to help you succeed. You'll have regular career, development, and performance conversations with your manager, as well as access to an online learning platform and a variety of mentoring programs to help you unlock future opportunities.

If you're passionate about helping clients and building deep, lasting relationships, TD offers diverse career paths where you can grow your expertise and make a meaningful impact.

We're committed to your success and foster a respectful workplace where diverse perspectives are valued, everyone has fair opportunities to grow, and you can unlock your full potential to achieve your career goals. Here at TD, we hire and develop the best.

Training & Onboarding
We will provide training and onboarding sessions to ensure that you've got everything you need to succeed in your new role.

Interview Process
We'll reach out to candidates of interest to schedule an interview. We do our best to communicate outcomes to all applicants by email or phone call.

Accommodation
Your accessibility is important to us. Please let us know if you'd like accommodations (including accessible meeting rooms, captioning for virtual interviews, etc.) to help us remove barriers so that you can participate throughout the interview process.
We look forward to hearing from you!

Language Requirement (Quebec only):