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Senior Mainframe Developer Jobs in Ontario (NOW HIRING)

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 ...

... DevOps for deployment, and Git repositories. Understanding and experience with Spring Framework ... have: mainframe development experience and enterprise architectural knowledge/experience ...

Sr. Business Systems Analyst

Toronto, ON · On-site

CA$76K - CA$115K/yr

Partner with vendors, solution designers, and engineers to align on design, API behaviours, data ... Knowledge of mainframe integration patterns, including batch processing and flat file exchanges.

Provide program-level updates and insights to senior technology and business leaders, ensuring ... REST APIs, Mainframe technologies, Windows/SQL Server, Java, Apache Tomcat, Salesforce, GitHub ...

Provide program-level updates and insights to senior technology and business leaders, ensuring ... REST APIs, Mainframe technologies, Windows/SQL Server, Java, Apache Tomcat, Salesforce, GitHub ...

CA$70 - CA$75/hr

Experience in programming and analysis; specialized CRM software package support at the specified ... Knowledge of integrated networking technologies, mainframe, midrange server, enterprise storage and ...

Experience in programming and analysis; specialized CRM software package support at the specified ... Knowledge of integrated networking technologies, mainframe, midrange server, enterprise storage and ...

Proficient in Cloud technology, Agile & DEVOPS. \n * The Quality Assurance Specialist is ... Experience with mainframe tools such as TSO\/SPF \n * Experience with ReadyAPI, WEB Services, API ...

Works closely with data analysts, data engineers, data scientists to bridge the gaps between data ... DB2 v13 on z\/OS (Mainframe) \n * DB2 on Windows \n * DB2 on Red Hat Linux (RHEL) \n Oracle ...

Since its inception in 1968, TCS has upheld the highest standards of innovation, engineering ... Engage with senior executives, clients, and global stakeholders to define scope, objectives, and ...

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 Sep 4, 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 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 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 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 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 78% Full Time, 11% Part Time, and 11% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $102,528 per year, or $49.3 per hour.

Senior Solution Architect

Scotiabank

Toronto, ON • On-site

Full-time

PTO

Re-posted 12 days ago


Job description

Requisition ID: 255616 
Join a purpose driven winning team, committed to results, in an inclusive and high-performing culture.

Canadian Banking Engineering is looking for a senior Solution Architect to enable enterprise scale platform modernization. As a senior member of Customer domain, you will own the Architecture for Customer Systems domain in technology with critical focus to establish clear architectural patterns enabling successful modernization of Customer data platform.  
This individual will bring deep technical expertise, pragmatic problem-solving ability to drive complex technology modernization. This individual will be key player in architecting the future technology road map for Canadian Banking applications. The role offers an exciting opportunity to modernize the bank's Customer data platform at enterprise scale.  


Is this role right for you? In this role, you will:

   Provide architecture leadership and act as the Architectural custodian for Customer Systems representing technology across the enterprise 
   Define and maintain target-state architecture for Customer Systems domain/ Customer platform that includes all upstream and downstream internal and 3rd party systems and data. 
   Own end to end architecture for complex multi-year technology modernization initiative that includes legacy systems and platform, master data systems, API services and other technologies.  
   Design migration strategies and patterns from legacy systems to modern platforms identifying technology challenges while offering future proof solutions  
   Own critical architectural decisions balancing technical debt reduction, operational risk, delivery timelines and regulatory requirements defending trade-offs  
   Regulatory & Security Alignment - Ensure the architecture and solution is as per bank's regulatory, security and compliance standards  
   Deep collaboration and partnership with business, operations, other technology domains and 3rd party partners with expertise in facilitating workshops, design and solution sessions to drive desired outcomes 
   Inspire teams to use AI, Tools and Automation while ensuring responsible AI usage as per bank's policy and framework 

Do you have the skills that will enable you to succeed in this role? We'd love to work with you if you have:

   15+ years of architecture (solution or enterprise) preferably with financial services with proven track record leading large scale customer information consolidation program, core / legacy system replacements and book of record migrations 
   Deep technical versatility spanning legacy platform (COBOL, mainframe, transactional systems) and modern technologies (microservices, REST APIs, cloud platforms, ETK frameworks)  
   Experience with master data management (e.g. MDM, Informatica), designing customer data models with industry specific extensions, data quality frameworks and large-scale data migration experience 
   Can do execution mindset with ability to inspire engineers, QE and other relevant stakeholders with ownership mindset driving delivery forward 
   Strong communication and articulations skills with ability to represent architectural topics at executive forums  
   Ability to effectively resolve conflicts, develop trust-based relationships and be a team player 
 


What's in it for you?
Diversity, Equity, Inclusion & Allyship - We strive to create an inclusive culture where every employee is empowered to reach their fullest potential, respected for who they are, and are embraced through bias-free practices and inclusive values across Scotiabank. We embrace diversity and provide opportunities for all employee to learn, grow & participate through our various Employee Resource Groups (ERGs) that span across diverse gender identities, ethnicity, race, age, ability & veterans.
   Accessibility and Workplace Accommodations - We value the unique skills and experiences each individual brings to the Bank and are committed to creating and maintaining an inclusive and accessible environment for everyone. Scotiabank continues to locate, remove, and prevent barriers so that we can build a diverse and inclusive environment while meeting accessibility requirements. 
   Upskilling through online courses, cross-functional development opportunities, and tuition assistance. 
   Competitive Rewards program including bonus, flexible vacation, personal, sick days, and benefits will start on day one.
   Community Engagement - no matter where you choose to work from; we offer opportunities for community engagement & belonging with our various programs.

Location(s):  Canada : Ontario : Toronto 
Scotiabank is a leading bank in the Americas. Guided by our purpose: "for every future", we help our customers, their families and their communities achieve success through a broad range of advice, products and services, including personal and commercial banking, wealth management and private banking, corporate and investment banking, and capital markets.  
At Scotiabank, we value the unique skills and experiences each individual brings to the Bank, and are committed to creating and maintaining an inclusive and accessible environment for everyone. If you require accommodation (including, but not limited to, an accessible interview site, alternate format documents, ASL Interpreter, or Assistive Technology) during the recruitment and selection process, please let our  Recruitment team know. If you require technical assistance, please click here. Candidates must apply directly online to be considered for this role. We thank all applicants for their interest in a career at Scotiabank; however, only those candidates who are selected for an interview will be contacted.