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Senior Mainframe Developer Jobs in Ontario (NOW HIRING)

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RQ09300 - Software Developer - Back End - Senior Job Openings RQ09300 - Software Developer ... Skill Set Requirements for Mainframe Developers: * Recent experience in using PL/I V4.5 or higher ...

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A prominent software solutions provider is looking for a Senior Software Developer specializing in back-end development. The role focuses on analyzing current system designs and developing code to ...

New

Royal Bank of Canada

Full Stack Developer

Toronto, ON · On-site

Work on Mainframe-based payment processing systems under senior guidance, learning core Mainframe ... Programming Language), Programming Languages, Software Applications, Software Development Life ...

Td

Senior IT Build/CICS Programmer

Toronto, ON · Remote

CA$81K - CA$115K/yr

We are seeking a Senior CICS systems programmer to join our team providing system support of IBM ... Middleware & Database Technical Services group within Infrastructure & Engineering - Mainframe ...

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How much do senior mainframe developer jobs pay per hour?

As of Jul 30, 2026, the average hourly pay for senior mainframe developer in Ontario is $49.29, according to ZipRecruiter salary data. Most workers in this role earn between $42.07 and $56.49 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Senior Mainframe Developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are some common challenges faced by Senior Mainframe Developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What are Senior Mainframe Developers?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.
What are the most commonly searched types of Mainframe Developer jobs in Ontario? The most popular types of Mainframe Developer jobs in Ontario are:
What are popular job titles related to Senior Mainframe Developer jobs in Ontario? For Senior Mainframe Developer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Senior Mainframe Developer jobs in Ontario look for? The top searched job categories for Senior Mainframe Developer jobs in Ontario are:
What cities in Ontario are hiring for Senior Mainframe Developer jobs? Cities in Ontario with the most Senior Mainframe Developer job openings:
What are popular job titles related to Senior Mainframe Developer jobs in ON? For Senior Mainframe Developer jobs in ON, the most frequently searched job titles are:
Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Ontario as of July 2026, with employment types broken down into 87% Full Time, 2% Part Time, 1% Temporary, and 10% Contract. Highlights an 81% Physical, 4% Hybrid, and 15% Remote job distribution, with an average salary of $102,528 per year, or $49.3 per hour.

RQ09300 - Software Developer - Back End - Senior

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Full-time

This job post has expired today. Applications are no longer accepted.

Job description

RQ09300 - Software Developer - Back End - Senior

Job Openings RQ09300 - Software Developer - Back End - Senior

About the job RQ09300 - Software Developer - Back End - Senior Responsibilities / Deliverable / Skill Set Requirements
  • Analysis leading to detailed information related to the current system logical and physical design and code structures during the concept phase of project
  • Analysis of technical database requirements leading to definition of changes required to support the new system. Interface and arrangements with the DBA/Data Management staff to progress these changes.
  • Creation of technical specifications in accordance with the OPS standards.
  • Identification of problems/issues along with mitigation strategies
  • Regular status reports on progress made.
  • Effective knowledge transfer to RUS and I&IT Cluster staff at all stages of this assignment
  • Report status to and follow overall direction from the Project Manager and/or Lead Technical Coordinator
  • Logical and physical design required to incorporate the required changes.
  • JAD sessions / walkthroughs to vet the design and obtain signoff of the technical specifications.
  • Development of new code and modification of existing code (online, batch and workstation) to implement the design as signed off in the technical specifications.
  • Interface with the mid-tier developers.
  • Ensure that the appropriate QA technical standards are incorporated into all artefacts and system code.
  • Preparation of test data and code unit testing.
  • Participation in integration testing including input to the integration test plan, setup of the test environment, creation of test data, execution of integration tests with the BAs and other developers, recording of test results and defect repair.
  • Planning and participation in code retrofit with other developers that are modifying the same LCS code in other projects.
  • Analysis of reported defects and corrections required to eliminate the defects.
  • Use of Ministry mandated management tools for code libraries.
Skill Set Requirements for Mainframe Developers:
  • Recent experience in using PL/I V4.5 or higher within the last 5 years.
  • Fujitsu NetCOBOL V4 or higher
  • 10+ years experience in programming and analysis.
  • 10+ years experience in designing and developing windows client application interacting with IMS TM applications.
  • 5+ years of experience writing mainframe PL/I transactions that process XML input and produce XML output and can consume non-mainframe webservices (Mainframe Mid-Tier integration, IMSCONNECT)
  • Knowledge of Ontarios Vehicle Licensing and Transportation Safetys policies around the Vehicle line of business.
  • Experience working in accordance with policies and procedures of Ontario Public Service
  • Experience with mainframe Screen Handling (MFS)
  • Experience with windows workstation Screen Handling Software (SCREENIO)
  • Experience with IMS DB V12 or higher (HALDB and DEDB) using the PLITDLI API.
  • Experience with DB2 for z/OS V11 or higher
  • Experience in Endevor source control tool
  • Experience in writing checkpoint restartable IMS BMPs
  • Experience scripting for SFTP (preferably in a mainframe environment)
  • Experience with z/OS V2.2 or higher
  • Expertise using mainframe IBM Debug Tool V13.1 or higher
  • Expertise using file and database management tools (either File Aid V10.1 or higher, or IBM File Manager V13.1 or higher)
  • Expertise using failure diagnostic tools (either Abend Aid V12.4 or higher, or IBM Fault Analyzer V13.1 or higher)
  • Experience with IBM sort utility (DFSORT)
  • Visual Studio 2008 or higher
  • Harvest Source Control V12.5 or higher
Evaluation Criteria IBM mainframe tools 15%
  • Experience with z/OS V2.2 or higher
  • Expertise using file and database management tools (either File Aid V10.1 or higher, or IBM File Manager V13.1 or higher)
  • Expertise using mainframe IBM Debug Tool V13.1 or higher.
  • Expertise using failure diagnostic tools (either Abend Aid V12.4 or higher, or IBM Fault Analyzer V13.1 or higher)
  • Experience with IBM sort utility (DFSORT)
IBM mainframe DBs, APIs, mainframe source control, mainframe batch 20%
  • Experience with IMS DB V12 or higher (HALDB and DEDB) using the PLITDLI API.
  • Experience with DB2 for z/OS V11 or higher
  • Experience in Endevor source control tool
  • Experience in writing checkpoint restartable IMS BMPs
  • 5+ years of experience writing mainframe PL/I transactions that process XML input and produce XML output and are able to consume
  • 10+ years experience in designing and developing windows client application interacting with IMS TM applications.
Programming Languages 25%
  • Recent experience in using PL/I V4.5 or higher within the last 5 years.
  • Fujitsu NetCOBOL V4 or higher
  • 10+ years experience in programming and analysis.
Public Sector Experience 5%
  • Knowledge of driver licensing and transportation safety policies around the Vehicle Registration line of business.
  • Experience working in accordance with policies and procedures of public sector
Screen Handling 10%
  • Experience with mainframe Screen Handling (MFS)
  • Experience with windows workstation Screen Handling Software (SCREENIO)
Windows workstation tools 10%
  • Visual Studio 2008 or higher
  • Harvest Source Control V12.5 or higher
Connectivity 5%
  • Experience scripting for SFTP (preferably in a mainframe environment)
Must have:
  • Experience with z/OS V2.2 or higher
  • Expertise using file and database management tools (either File Aid V10.1 or higher, or IBM File Manager V13.1 or higher)
  • Experience with IMS DB V12 or higher (HALDB and DEDB) using the PLITDLI API.
  • Experience with DB2 for z/OS V11 or higher
  • 5+ years of experience writing mainframe PL/I transactions that process XML input and produce XML output and are able to consume
  • Recent experience in using PL/I V4.5 or higher within the last 5 years.
Additional Experience

5+ years of experience writing mainframe PL/I transactions that process XML input and produce XML output and can consume non-mainframe webservices (Mainframe Mid-Tier integration, IMSCONNECT)

Recent experience in using PL/I V4.5 or higher within the last 5 years.

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