1

Senior Mainframe Developer Jobs in Ontario (NOW HIRING)

Software Engineer III

Toronto, ON · On-site

CA$125K - CA$154K/yr

Regular interactions with senior members of the technology team will be required as well as ... Mainframe experience: * COBOL, JCL, IMS DB/DC environment, IMS Databases, DB2, MQ, Endevor, CA7 ...

Canadian Banking Engineering is looking for a senior Solution Architect to enable enterprise scale ... mainframe, transactional systems) and modern technologies (microservices, REST APIs, cloud ...

As a Senior Project Manager, you willbe responsible foroverseeing project planning, execution,and ... Science, Engineering or similar). * Experience managing or working on mainframe software ...

Contributes to the overall success of Client Management & Engagement Engineering ensuring specific ... Mainframe environment Experience with testing large data transformations and migrations at ...

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 ...

Showing results 21-40

Senior Mainframe Developer information

See Ontario salary details

$29

$49

$71

How much do senior mainframe developer jobs pay per hour?

As of Aug 9, 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 is a senior mainframe developer?

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:
Infographic showing various Senior Mainframe Developer job openings in Ontario as of August 2026, with employment types broken down into 84% Full Time, 2% Part Time, and 14% 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.

Senior Engineer, Application Maintenance & Transformation

Royal Bank of Canada

Toronto, ON • On-site

Full-time

Re-posted 13 days ago


Job description

Job Description

Developing SRE automation and operational improvements/solutions, actively participate in deploying software applications and automation tools, and IT infrastructure. Review, verify, and validate the software code developed for quality and performance. Participate in change Management, Incident and problem Management for the platform and/or any dependent components which the product engineering teams rely on for their work. Provides information on the detailed technical design and development of applications using existing and emerging technology platforms. Applies experience, skills, and practices to perform a variety of assignments.
What will you do?

  • 40% of time will be developing SRE automation and operational improvements/solutions.

  • 40% of time actively participate in deploying various operationally critical financial software applications and automation tools, and IT infrastructure. Review, verify, and validate the software code developed for quality and performance.

  • Participate in change Management, Incident and problem Management for the platform and/or any dependent components which the product engineering teams rely on for their work.

  • 10% of time playing the role of scrum master or Kanban driving the team tasks.

  • 10% attending technical meetings, trainings with cross functional teams, Infrastructure and platform teams, performing POC's for roadmap items.

  • Maintain and improve DevOPS pipelines, frameworks, perform chaos engineering activities

  • Identifying and deploying cybersecurity measures by continuously performing vulnerability assessment and risk management.

  • Automate alerts for metrics on performance, cost, vulnerabilities, risk, compliance violations.

  • Build frameworks that test the performance and resiliency of our platform services/tools

  • Build/integrate/administer systems and tools that enable engineering teams to observe their applications in production with autonomy (Dashboards, APMs).

  • Improve processes/runbooks and champion automation of any manual items around support.

  • Service level metric understanding and responsible for consistently meeting service-level agreements (SLAs) for services owned by group.

  • Drive a culture of reliability, and ensuring teams are aligned around common priorities and approaches defined by Senior leadership.

  • Assist Sr. Manager in capacity planning and cost optimization.

  • Drive resolution and stakeholder communication during incidents. The candidate should adapt at prioritizing multiple issues in a high stress environment.

What do you need to succeed?

Must have

  • Bachelor of Computer Science, Electrical or Electronics Engineering or related field or equivalent experience.

  • 6+ years' IT experience in software development and/or maintenance or SRE experience.

  • 3+ years' experience working on JavaSpring bootapplications and rest API development.

  • 2+ years' experience working on relational databases - MS-SQL Server or MySQL, MariaDB and SingleStore or any in-memory distributed databases.

  • Experience working on Containerization platforms such as Docker and container orchestration tools like Kubernetes (OpenShift Kubernetes Service preferred).

  • Must have Experience using centralized logging solutions (Splunk, Elk (preferred), etc.) and active monitoring systems (Catchpoint or Dynatrace etc.)

  • Must have Experience deploying and operating cloud-native applications in a Private cloud (OpenShift) or public cloud (Azure and/or AWS preferred)

  • Experience working on SAP Business Objects Business intelligence applications.

  • Must be Self-starter, self-motivated, resourceful, and driven to work with cross functional teams in large enterprises with complex org structures to meet business timelines on delivery.

  • Solid Git skills with experience working on popular CI tools - Jenkins or UCD

  • Experience working on PagerDuty, Postman, ServiceNow, SonarQube, NexusIQ and vault tools.

Nice to have:

  • Exposure to Snowflake environment and experience setting up data pipelines and ETL processes integrating data from various sources into the Enterprise Datawarehouse's or Snowflake.

  • SnowPro Core Certification and/or Exposure to Datawarehouse's like Informatica.

  • Experience implementing dashboards to help teams visualize logs, instrumentation to ensure optimal performance of the platform services, infrastructure, and deployed applications (preferably Grafana).

  • Experience creating runbooks, processes, and test plans around reliability, performance, etc. of infra/applications

  • Exposure to IBM Mainframe tools and environment.

What's in it for you?

We thrive on the challenge to be our best, progressive thinking to keep growing, and working together to deliver trusted advice to help our clients thrive and communities prosper. We care about each other, reaching our potential, making a difference to our communities, and achieving success that is mutual.

  • A comprehensive Total Rewards Program including bonuses and flexible benefits, competitive compensation, commissions, and stock where applicable

  • Leaders who support your development through coaching and managing opportunities

  • Ability to make a difference and lasting impact

  • Work in a dynamic, collaborative, progressive, and high-performing team

  • A world-class training program in financial services

  • Flexible work/life balance options

  • Opportunities to do challenging work


#Ll-POST

    Job Skills

    Agile Methodology, API Documentation, Apigee API, DevOps, Elk Stack, Grafana, Group Problem Solving, Interpersonal Communication, IT Automation, IT Monitoring, Java APIs, MemSQL, Microsoft SQL Server, Red Hat Ansible, Red Hat OpenStack Platform, Snowflake Data Warehouse, Software Development Life Cycle (SDLC), Software Engineering, Software Product Technical Knowledge, Splunk, Structured Query Language (SQL), System Applications

    Additional Job Details

    Address:

    RBC CENTRE, 155 WELLINGTON ST W:TORONTO

    City:

    Toronto

    Country:

    Canada

    Work hours/week:

    37.5

    Employment Type:

    Full time

    Platform:

    TECHNOLOGY AND OPERATIONS

    Job Type:

    Regular

    Pay Type:

    Salaried

    Posted Date:

    2026-05-07

    Application Deadline:

    2026-08-14

    Note: Applications will be accepted until 11:59 PM on the day prior to the application deadline date above

    Our Employment Opportunities

    At RBC, we are guided by living shared values of Client First, Integrity, Collaboration, Respect and Excellence and winning together as One RBC. We believe an inclusive workplace that has diverse perspectives is core to our continued growth as one of the largest and most successful banks in the world. Maintaining a workplace where our employees feel supported to perform at their best, effectively collaborate, drive innovation, and grow professionally helps to bring our Purpose to life and create value for our clients and communities. RBC strives to deliver this through policies and programs intended to foster a workplace based on respect, belonging and opportunity for all.

    Join our Talent Community
    Stay in-the-know about great career opportunities at RBC. Sign up and get customized info on our latest jobs, career tips and Recruitment events that matter to you.
    Expand your limits and create a new future together at RBC. Find out how we use our passion and drive to enhance the well-being of our clients and communities at jobs.rbc.com.

    RBC is presently inviting candidates to apply for this existing vacancy. Applying to this posting allows you to express your interest in this current career opportunity at RBC. Qualified applicants may be contacted to review their resume in more detail.

    Employment Type: FULL_TIME