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Mainframes Developer Jobs in Toronto, ON (NOW HIRING)

Td

Software Engineer II

Toronto, ON · On-site

Develop and maintain technical solutions, ensuring adherence to engineering and architectural ... Mainframe experience: * COBOL, JCL, IMS DB/DC environment, IMS Databases, DB2, MQ, Endevor, CA7 ...

BMO Capital Markets

Senior Technical Lead

Toronto, ON · On-site

... Mainframe ecosystems, cloud technologies, APIs, and enterprise-scale production environments . As a technical leader, you'll influence platform strategy, guide engineering teams, solve complex ...

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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 Toronto, ON?

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

What job categories do people searching Mainframes Developer jobs in Toronto, ON look for?

The top searched job categories for Mainframes Developer jobs in Toronto, ON are:

What cities near Toronto, ON are hiring for Mainframes Developer jobs?

Cities near Toronto, ON with the most Mainframes Developer job openings:

Mainframes Developer jobs near you
Infographic showing various Mainframes Developer job openings in Toronto, ON as of August 2026, with employment types broken down into 84% Full Time, 3% Part Time, and 13% Contract. Highlights an 79% Physical, 8% Hybrid, and 13% Remote job distribution.

RQ11231 - 2 x Sr. Software Developer

Toronto, ON • On-site

Source Code
Computer and Peripheral Equipment Manufacturing • 201 - 500 employees
Learn more about Source Codeexternal

CA$88.54 - CA$106.25/hr

Full-time

Re-posted 2 days ago

Job description

RQ11231 - Sr. Software Developer

2 openings 

1-year contract (248 business days) - possible extension

ONSITE 5 days - 5700 Yonge St. Toronto

MUST HAVES:

  1. 10+ years demonstrated knowledge and experience of IT systems development in multi-platform environments (web, desktop, mobile, mainframe, micro/mini systems, etc.) and multi-tiered open-standard technologies such as 
  2. JSP/Servlet, JEE, EJB, JNDI, JDBC, JMS, XML, JSON, REST and SOAP-based Web Services, Strut Framework, Oracle Designer, WebSphere, SUN Solaris, Windows 2008/2012, .NET, VPN, PKI, LDAP, Oracle RDBMS (versions 9, 10, 11 and/or 12), PL/SQL, development and deployment tools (e.g. source codes and application packages management).
  3. Demonstrated advanced knowledge and experience of full-stack multi-tier solutions / system components analysis, design, coding and systems integration, using multiple technologies - REST API, SOAP/WSDL web services, JSON/XML messaging and User Interface (e.g. Web components, UI libraries/frameworks), as well as integration with third party solutions / services.
  4. Able to identify and coordinate the resolution of technical problems and incidents, conduct research, assess client requirements, lead design projects, and develop recommendations.
  5. Experience with systems debugging, refactoring and optimization

Responsibilities:

  • Requirements analysis, in collaboration with the business analysts
  • Solutions design and architecture artifacts - conceptual, logical and physical
  • Architecture checkpoints activities and support
  • Solutions design walkthrough
  • Complete documentation - technical and user guides
  • System/solution components coding and integration
  • System unit and integration testing
  • Test cases development for unit and integration testing
  • Collaboration with system testers to develop test cases for system functional, performance and vulnerability testing
  • Knowledge transfer checklist and walkthrough for the technical project team members

AI Disclaimer: Source Code may use artificial intelligence (AI) tools to assist in certain aspects of its recruiting and business operations.

Note: The higher end of the range is intended for absolutely exceptional candidates who meet all must-have requirements and most or all nice-to-have qualifications. The client will evaluate candidates based on both rate expectations and overall skill set when shortlisting.

INCORPORATED RATE RANGE (7.25 billable hours per day)

  • $88.54/hr - $106.25/hr Inc.

T4 RATE RANGE (7.25 billable hours per day)

  • $70.83/hr - $85.00/hr T4