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Software Engineer; Mainframe

Job in Toronto, Ontario, C6A, Canada
Listing for: Sun Life Financial
Full Time position
Listed on 2026-06-08
Job specializations:
  • Software Development
    Software Engineer, DevOps, Backend Developer, Senior Developer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 CAD Yearly CAD 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Position: Software Engineer (Mainframe)

You are as unique as your background, experience and point of view. Here, you’ll be encouraged, empowered and challenged to be your best self. You'll work with dynamic colleagues – experts in their fields – who are eager to share their knowledge with you. Your leaders will inspire and help you reach your potential and soar to new heights. Every day, you'll have new and exciting opportunities to make life brighter for our Clients – who are at the heart of everything we do.

Discover how you can make a difference in the lives of individuals, families and communities around the world.

Job Description

We're evolving how we attract and engage with our clients, and as a Mainframe Software Engineer on our team, you'll design, develop, support, and analyze large‑scale applications and systems. This is a hands‑on role focused on building high‑quality solutions while growing your technical depth and contributing to meaningful client experiences.

This role is ideal for an engineer who thrives in a collaborative environment, values learning and continuous improvement, and can adapt to changing priorities while maintaining delivery quality.

Own Your Contributions
  • Break down and analyze application requirements into well‑scoped work items
  • Design and develop mainframe applications under the guidance of senior engineers
  • Identify risks and raise them early to protect delivery timelines
  • Make sound technical decisions aligned with team standards and long‑term maintainability
  • Contribute to maintaining the health, reliability, and evolvability of existing systems
Build and Learn
  • Contribute to end‑to‑end application development using modern mainframe tools (IBM IDz, zDevOps, VS Code, Zowe, Git Hub Copilot)
  • Write production‑quality COBOL code with appropriate testing and documentation
  • Learn and apply lightweight engineering practices that balance speed and quality
  • Stay current with emerging technologies and AI‑assisted development tools
Collaborate Effectively
  • Work with peers, senior engineers, and stakeholders to deliver solutions
  • Clearly communicate progress, risks, and trade‑offs
  • Contribute to improving client and developer experience through collaboration
  • Share knowledge with peers and contribute to improving team practices and standards
What You Bring
  • 3–5 years of experience in mainframe application development
  • Working knowledge of zOS/OS/390 environments
  • Experience with TSO/ISPF, DB2, IMS, JCL, and COBOL
  • Understanding of MQ and middleware concepts
  • Strong problem‑solving and communication skills
  • Familiarity with Git, Bitbucket, Jenkins, and zDevOps pipelines is a plus
  • Experience with agile methodologies such as Scrum or Kanban is an asset
  • Bilingualism (French, English, both oral and written) is required for Quebec only for frequent interactions with English and French‑speaking colleagues or internal partners across Canada or worldwide.
Product Mindset
  • You think in terms of client and business outcomes
  • You’re comfortable learning through iteration and feedback
  • You value ownership, accountability, and continuous improvement
Why This Role
  • Opportunity to contribute to systems that support clients’ well‑being
  • Work within a collaborative and inclusive engineering culture
  • Ongoing learning through coaching, training, and hands‑on experience
  • Access to modern development tooling and a supportive team environment
Notes / Operational Expectations

Occasional off‑hours or weekend support may be required during key production activities; participation in an on‑call rotation may apply.

Salary Range: 65,000/65 000 – 105,000/105 000

Job Category: IT – Application Development

Posting End Date: 08/05/2026

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