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Mainframes Developer Jobs in Ontario (NOW HIRING)

Maarut

CA$1 - CA$11/hr

Strong proficiency in object-oriented programming and functional programming with modern Java ... Mainframe/IMS * Hands-On experience in messaging queuing (Azure Service Bus) and event driven ...

Adastra Corporation

AWS Cloud Architect

Thornhill, ON · Hybrid

Lead discovery and dependency mapping of legacy environments including mainframes, core banking ... Collaborate with application owners and engineering teams on cloud-native modernization and ...

Td

Sr. Business Systems Analyst

Toronto, ON · On-site

CA$81K - CA$115K/yr

If you have an engineering mindset and a passion for deeply engaging with Journey partners to fully ... The ideal candidate brings a solid IT background-preferably in Mainframe-exceptional communication ...

Maarut

Strong proficiency in object\-oriented programming and functional programming with modern Java ... Mainframe\/IMS\n \n * Hands\-On experience in messaging queuing (Azure Service Bus) and event ...

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Mainframes Developer information

What is the difference between Mainframes Developer vs Mainframes Analyst?

AspectMainframes DeveloperMainframes Analyst
Required CredentialsTypically a degree in Computer Science or related field; certifications like IBM Certified SpecialistSimilar credentials; often holds certifications in mainframe systems and analysis
Work EnvironmentDevelops, codes, and tests mainframe applications in a software development settingAnalyzes existing mainframe systems, gathers requirements, and supports system improvements
Employer & Industry UsageUsed by banks, insurance companies, and large enterprises for application developmentEmployed in similar industries for system analysis, troubleshooting, and process optimization

While both roles require knowledge of mainframe systems and similar credentials, Mainframes Developers focus on creating and maintaining mainframe applications, whereas Mainframes Analysts analyze existing systems to improve performance and efficiency. Both roles are vital in large enterprise IT environments.

Is a mainframes developer a good career?

A mainframes developer is a specialized IT professional who maintains and develops applications on mainframe systems, which are used by large organizations for critical data processing. The role offers stable employment, competitive salaries, and opportunities to work with legacy systems and mainframe programming languages like COBOL. However, it requires specific skills and certifications, and the field may have limited growth compared to emerging technologies.

Is a mainframes developer still in demand?

Mainframes developers are still in demand in industries such as finance, government, and healthcare that rely on legacy systems. They typically work with COBOL, JCL, and mainframe environments, and demand persists due to the ongoing need to maintain and upgrade existing mainframe applications. However, the number of new positions is limited compared to emerging technologies, and skills in mainframe modernization are increasingly valued.

What does a mainframes developer do?

A mainframes developer designs, codes, tests, and maintains applications running on mainframe computers, often using languages like COBOL, PL/I, or Assembler. They ensure the stability, security, and efficiency of large-scale enterprise systems, frequently working with legacy code and mainframe-specific tools in a structured environment.

What are popular job titles related to Mainframes Developer jobs in Ontario?

For Mainframes Developer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Mainframes Developer jobs in Ontario look for?

The top searched job categories for Mainframes Developer jobs in Ontario are:

What cities in Ontario are hiring for Mainframes Developer jobs?

Cities in Ontario with the most Mainframes Developer job openings:

Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Ontario as of August 2026, with employment types broken down into 75% Full Time, 12% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Student, Technology Modernization Engineer (Winter 2027)

Waterloo, ON • On-site, Remote

Sunlife Group of Companies
See more jobs at Sunlife Group of Companiesexternal

Full-time

Posted 5 days ago

Job description

At Sun Life,we'redriven by our Purpose: helping our Clientsachieve lifetime financial security and live healthier lives. Our values shape how we work: caring, authentic, bold, inspiring, and impactful.


Our student and new graduate programs offer a chance to explore Sun Life from the inside. You'll make a difference in the lives of our customers and communities, while building the skills and experience that allow you to grow in a meaningful and rewarding way.


Job Description:

This role requires Reliability Status Clearance. In addition to a law enforcementinquiry and a credit check, as part of yourapplication, the Government of Canada willask if you lived or travelled outside of Canadafor 6-consecutive months during the last 5years, and you must account for all activitiesduring this time. Important: ObtainingReliability Status Clearance within areasonable amount of time is a conditionrequired to start employment for this roleat Sun Life.

Join Sun Life's Technology Modernization team and help shape the next generation of enterprise engineering practices. As a Technology Modernization Engineer, you will work alongside experienced engineers to improve developer productivity, automate processes, implement standards, and support modernization initiatives across enterprise platforms. This role provides hands-on experience with DevOps practices, automation, developer tools, APIs, CI/CD pipelines, and emerging technologies that enable faster and more efficient software delivery.

Preferred skills

  • Experience with programming or scripting languages such as Python, JavaScript, TypeScript, Java, or Bash
  • Experience with IBM mainframe System Z
  • Familiarity with source control tools such as Bitbucket & Git
  • Understanding of DevOps concepts and CI/CD pipelines
  • Interest in automation, developer productivity, and platform engineering
  • Experience with Visual Studio Code or other development environments
  • Understanding of REST APIs and web technologies
  • Familiarity with Agile development practices
  • Strong analytical and problem-solving skills
  • Effective verbal and written communication skills
  • Curiosity and willingness to learn new technologies

Qualifications

  • Currently enrolled in a post-secondary program in Computer Science, Software Engineering, Computer Engineering, Information Technology, or a related discipline
  • Eligible to participate in a co-op or internship program
  • Strong academic standing
  • Demonstrated interest in software development, automation, or technology modernization
  • Ability to work collaboratively in a team environment
  • Ability to manage multiple tasks and priorities
  • Self-motivated and eager to learn
  • Strong organizational and time-management skills
  • A graduation date of April 2027 or later is required.

Responsibilities

  • Assist in the development of automation solutions to improve operational efficiency
  • Support the creation and enhancement of CI/CD pipelines and DevOps processes
  • Develop scripts and tools to streamline engineering workflows
  • Help evaluate and implement developer productivity tools and platforms
  • Contribute to the development of standards, best practices, and technical documentation
  • Participate in testing, troubleshooting, and continuous improvement activities
  • Collaborate with engineers, architects, and technology teams on modernization initiatives
  • Analyze processes and identify opportunities for automation and optimization
  • Support proof-of-concept projects involving APIs, automation, and developer tooling
  • Present findings, recommendations, and project outcomes to team members and stakeholders

The Base Pay range is for the primary location for which the job is posted for. The Base Pay which you will be considered for will vary depending on the Campus program you are selected for.


Eligible Sun Life employees for various Campus Graduate programs will also participate in various incentive plans, payment under which is discretionary and subject to individual and company performance


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 thebrightside@sunlife.com.


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.


We may use artificial intelligence to support candidate sourcing, screening, interview scheduling.


We thank all applicants for showing an interest in this position. Only those selected for an interview will be contacted.


Job Category:

Temporary Employee

Posting End Date:

17/09/2026

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