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 workplace, 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, GitHub 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

As this position is posted in several locations, we specify that bilingualism (French, English, both oral and written) is required for Quebec only for the 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.

The Base Pay range is for the primary location for which the job is posted. It may vary depending on the work location of the successful candidate or other factors. In addition to Base Pay, eligible Sun Life employees participate in various incentive plans, payment under which is discretionary and subject to individual and company performance. Certain sales focused roles have sales incentive plans based on individual or group sales results.

Diversity and inclusion have always been at the core of our values at Sun Life. A diverse workforce with wide perspectives and creative ideas benefits our Clients, the communities where we operate and all of us as colleagues. We welcome applications from qualified individuals from all backgrounds.

Persons with disabilities who need accommodation in the application process, or those needing job postings in an alternative format, may e‑mail a request to [email protected].

We are proud to be a hybrid organization that offers our employees the choice and flexibility to work from both the office and virtually based on the needs of the business, our Clients and you! Several work options are available and can be discussed throughout the selection process depending on the role requirements and individual needs.

Salary Range
65,000/65 000 - 105,000/105 000

Job Category
IT - Application Development

Posting End Date
16/07/2026

#J-18808-Ljbffr

📌 Software Engineer (Mainframe) (Ontario)
🏢 Sun Life
📍 Ontario