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Mainframe Jobs in Ontario (NOW HIRING)

United States Digital Space LLC

About the role As a Mainframe Developer, you will make an impact by designing, optimizing, and modernizing mission‑critical healthcare payer systems that support claims processing, member ...

LearnQuest

Mainframe Expert (Remote)

Toronto, ON · Remote

We are seeking a skilled Mainframe "File-Manager" Expert to join our dynamic team and contribute to the development of a comprehensive course. The ideal candidate will have in-depth expertise in File ...

CorGTA

Mainframe Developer - 6 month contract

Toronto, ON · Hybrid

CA$61/hr

Mainframe Developer Rates: Up to $61.00 p/h INC. Location: Toronto, 3-4 days per week on-site Structure: 6 month contract -- We have a great new opportunity to support one of our Financial Sector ...

New

Scotiabank

Mainframe Developer

Toronto, ON · On-site

Comprehensive experience in mainframe development complex programs using Cobol, JCL, IMS DB, DB2, VSAM, CA7, SAS, Netron. Experience working in an agile environment / methodology / deployment (e.g.

CIBC US

Mainframe Application Developer

Toronto, ON · Hybrid

As a Mainframe Developer, you'll lead the planning, technical design, and development of complex, enterprise-scale applications. You'll assemble, implement, and maintain flexible solutions that ...

Td

Quality Engineer I - Mainframe

Toronto, ON · Remote

CA$69K - CA$98K/yr

Mainframe testing (COBOL, DB2, IMS, CICS screens is a must) and API is good to have. * As a Test engineer for small complexity initiatives, accountable for implementing effective test strategies and ...

LearnQuest

Mainframe DevOps Expert (Remote)

Toronto, ON · Remote

We are seeking a highly skilled Mainframe DevOps Expert to join our team for an exciting short-term project. Key Responsibilities: As a Curriculum Development Specialist, your primary responsibility ...

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All JobsMainframe JobsMainframe Jobs in Ontario

Mainframe information

See Ontario salary details

$5

$37

$63

How much do mainframe jobs pay per hour?

As of Jul 29, 2026, the average hourly pay for mainframe in Ontario is $37.88, according to ZipRecruiter salary data. Most workers in this role earn between $26.68 and $40.14 per hour, depending on experience, location, and employer.

What is the average salary for mainframe jobs?

The average salary for mainframe professionals typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior roles or specialized skills in mainframe environments, such as COBOL or JCL, can command higher salaries. Many positions also offer benefits like retirement plans and training opportunities.

What jobs in the US pay 300,000 a year?

Mainframe professionals such as senior systems architects, lead developers, and IT managers with extensive experience and specialized skills can earn $300,000 or more annually. These roles often require expertise in mainframe technologies like COBOL, JCL, and mainframe security, along with certifications and leadership responsibilities.

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

To excel as a Mainframe Developer, a strong background in COBOL, JCL, mainframe operating systems (like z/OS), and database management is essential, often supported by a degree in computer science or a related field. Familiarity with tools such as IBM DB2, CICS, VSAM, and mainframe version control systems is typically required, and certifications like IBM Certified System Programmer can be advantageous. Analytical thinking, problem-solving abilities, and effective communication are important soft skills for identifying issues and collaborating with cross-functional teams. These skills ensure reliable maintenance, development, and modernization of mission-critical legacy systems that support large-scale business operations.

Is mainframe a good career option?

Mainframe careers involve working with large-scale computer systems used by many organizations for critical applications. The role typically requires knowledge of programming languages like COBOL, system administration, and understanding of legacy systems, with steady demand in finance, government, and large enterprises. It can be a stable career with opportunities for specialization and certification but may require ongoing learning of evolving technologies.

What Is a Mainframe Application Developer Job Description?

The job description of a mainframe application developer is to sustain the central data processing system, or mainframe. Common duties include designing applications, analyzing data, running reports, and deploying mainframe applications. This job requires a great deal of collaboration to keep the mainframe going and a strong understanding of mainframe languages. A key part of this role is to align the design of the mainframe with changing business needs.

What are mainframes and what do they do?

Mainframes are powerful computers used mainly by large organizations for critical applications, bulk data processing, large-scale transaction processing, and enterprise resource planning. They are known for their reliability, scalability, and security, making them essential for industries like banking, healthcare, and government. Mainframes can handle thousands of users and transactions simultaneously, supporting the core operations of many businesses.

What are some typical challenges faced by mainframe professionals when integrating legacy systems with modern technologies?

Mainframe professionals often encounter challenges when integrating legacy systems with newer technologies, such as ensuring data compatibility, managing security protocols, and minimizing downtime during migration. These tasks require a deep understanding of both the existing mainframe architecture and the modern platforms being introduced. Collaboration with cross-functional teams—including application developers, security specialists, and project managers—is essential to ensure seamless integration and to address potential issues proactively. Staying updated on the latest integration tools and best practices also helps in overcoming these challenges efficiently.

Can AI replace mainframe?

Mainframe professionals work with large-scale, mission-critical systems that require specialized skills in legacy technologies, security, and data management. While AI can automate certain tasks like data analysis and system monitoring, it is unlikely to fully replace mainframe roles due to the complexity and reliability requirements of mainframe environments. Instead, AI tools are often integrated to enhance efficiency and support mainframe operations.

What is the difference between Mainframe vs Mainframe Developer?

AspectMainframeMainframe Developer
Primary RoleMaintains and manages mainframe hardware and systemsDesigns, develops, and tests mainframe applications
Skills & CertificationsKnowledge of mainframe hardware, OS, and basic scriptingProficiency in COBOL, JCL, and mainframe programming languages
Work EnvironmentData centers, enterprise IT departmentsDevelopment teams within mainframe environments
Industry UsageUsed by organizations with legacy systemsDevelops and maintains those legacy systems

While Mainframe professionals focus on maintaining the hardware and system infrastructure, Mainframe Developers specialize in creating and updating mainframe applications. Both roles require knowledge of mainframe environments, but their responsibilities differ significantly within the same industry.

More about Mainframe jobs
What are the most commonly searched types of Mainframe jobs in Ontario? The most popular types of Mainframe jobs in Ontario are:
What are popular job titles related to Mainframe jobs in Ontario? For Mainframe jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Mainframe jobs in Ontario look for? The top searched job categories for Mainframe jobs in Ontario are:
Mainframe jobs near you
Infographic showing various Mainframe job openings in Ontario as of July 2026, with employment types broken down into 87% Full Time, 5% Part Time, and 8% Contract. Highlights an 83% Physical, 6% Hybrid, and 11% Remote job distribution, with an average salary of $78,785 per year, or $37.9 per hour.

Mainframe developer

United States Digital Space LLC

Hybrid

Full-time

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

Job description

About the role

As a Mainframe Developer, you will make an impact by designing, optimizing, and modernizing mission‑critical healthcare payer systems that support claims processing, member management, eligibility, billing, and provider operations. You will be a valued member of the technology team and work collaboratively with business stakeholders, product owners, architects, developers, and operations teams to deliver scalable, reliable, and compliant mainframe solutions.

Responsibilities
  • Design and implement scalable mainframe architectures utilizing COBOL, CICS, VSAM, DB2, and JCL to support critical healthcare payer applications.
  • Partner with business and product teams to translate payer business requirements into robust technical solutions that improve claims processing, member services, and operational efficiency.
  • Optimize CICS transactions, VSAM data structures, and DB2 databases to enhance system performance, availability, and data integrity.
  • Develop and maintain JCL workflows and COBOL applications supporting batch and online processing across payer platforms.
  • Conduct architecture reviews, impact assessments, and performance evaluations to ensure solutions remain secure, maintainable, and aligned with evolving business and regulatory requirements.
Work model

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position requiring associates to work from a client or the company office as determined by project needs in Mississauga, ON. Regardless of your working arrangement, we are here to support a healthy work‑life balance through our various wellbeing programs.

Qualifications
  • 4‑6 years of hands‑on experience designing and developing solutions using COBOL, CICS, VSAM, DB2, and JCL in enterprise mainframe environments.
  • Strong knowledge of healthcare payer operations, including claims adjudication, eligibility determination, provider management, billing, and policy administration.
  • Experience designing secure, scalable, and high‑performance data solutions using DB2 and VSAM.
  • Proven expertise developing and maintaining COBOL applications and JCL procedures for complex batch and online processing environments.
  • Hands‑on experience with CICS transaction processing, performance tuning, and system optimization to support business‑critical applications.
  • Experience performing architecture reviews, impact assessments, and modernization initiatives for large‑scale mainframe environments.
  • Knowledge of healthcare industry regulations, compliance requirements, and data privacy standards affecting payer operations.
  • Ability to analyze system performance across multiple technology layers and implement solutions that improve reliability and operational efficiency.
  • Strong collaboration and communication skills with experience working in cross‑functional and hybrid delivery teams.
  • Experience supporting high‑volume transactional systems requiring exceptional availability, resilience, and scalability.
We’re excited to meet

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

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