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Remote Mainframe Developer Jobs in Toronto, ON (NOW HIRING)

Spectrum Health Care

AI Developer

Toronto, ON · Remote

Spectrum Health Care is seeking an AI Developer to join our growing Data and AI Team and help shape the next generation of healthcare intelligence. This is a full‑stack AI role where you will work ...

Borrowell

Software Developer

Toronto, ON · On-site +1

As a Software Developer on Borrowell's Engineering team, you will design, develop, optimize, test ... While this role is remote, we are currently only able to hire candidates physically located in ...

Fortive

Senior Software Engineer

Toronto, ON · Remote

... Developer to design, develop, and maintain software applications. This role requires strong technical expertise, problem-solving skills, and a passion for learning and innovation. This is a remote ...

TapMango

Senior Software Engineer

Toronto, ON · Remote

CA$110K - CA$140K/yr

Performance optimization and scalability work for multi-tenant SaaS environment * DevOps activities ... Fully remote work & support to assist with making your remote office space as comfortable as ...

Career Renew

Software Engineer - Web3

Toronto, ON · Remote

$150K - $250K/yr

Career Renew is recruiting for one of its clients a Software Engineer - Web3 - this is a fully remote role for N America based candidates. Salary range: 150-250K USD base plus benefits. We are ...

Talentlab

Senior Software Engineer

Toronto, ON · Remote

Remote (Canada) We're looking for a Senior Software Engineer to join a correctness-critical engineering function responsible for money movement, ledgering, reconciliation, and core financial ...

Career Renew

Software Engineer - Web3

Toronto, ON · Remote

$150K - $250K/yr

Career Renew is recruiting for one of its clients a Software Engineer - Web3 - this is a fully remote role for N America based candidates. Salary range: 150-250K USD base plus benefits. We are ...

Geotab

Senior Software Developer

Oakville, ON · On-site +1

As a Senior Software Developer your key area of responsibility will be driving full-stack development with a strong focus on frontend features, specifically managing video frontend development and ...

NexHealth

Senior Software Engineer

Toronto, ON · On-site +1

... balances remote and onsite work (the specifics of which are at the discretion of NexHealth ... Knowledge of common DevOps tools and practices. * Firm grasp of quality and security engineering ...

Epistemix

Senior Back End Software Engineer

Toronto, ON · Remote

Our software engineers at Epistemix show a clear passion for quality and love to bring software to ... We are fully remote, with team members in the United States and Europe. Benefits include: * Equity ...

MBR Partners

Senior Software Engineer

Toronto, ON · Remote

$150K/yr

With a back-end team in the Philippines, I'm currently hiring for a Senior Software Engineer ... remote role, ideally US or Europe ( NO Applications from India / Pakistan ) EST Timezone

MBR Partners

Senior Software Engineer

Toronto, ON · Remote

$150K/yr

With a back-end team in the Philippines, I'm currently hiring for a Senior Software Engineer ... remote role, ideally US or Europe ( NO Applications from India / Pakistan ) EST Timezone

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Remote Mainframe Developer information

Is IBM still making mainframes?

IBM continues to manufacture mainframes, such as the IBM Z series, which are widely used in enterprise environments for their reliability, security, and scalability. Mainframes remain a key platform for large-scale data processing and transaction workloads, and many organizations rely on mainframe developers to maintain and upgrade these systems.

What Does a Remote Mainframe Developer Do?

As a remote mainframe developer, you work from home to design, code, test, and configure software and applications used on a mainframe system. Mainframes are large computers with particularly high processing power and are often used for critical tasks like bulk data processing or enterprise resource planning. In this role, you may help ensure all new software is fully backward-compatible, monitor system performance, isolate errors, and work collaboratively with other developers as needed. Most mainframe developers work for larger companies. As a remote employee, you use virtual office software, phone, chat, or email to remain connected to other employees.

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

To thrive as a Remote Mainframe Developer, you need strong programming skills in languages like COBOL, JCL, and experience with mainframe operating systems, often supported by a degree in computer science or related field. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is typically required, along with relevant certifications. Excellent problem-solving abilities, independent work ethic, and effective virtual communication are standout soft skills for this remote role. These skills ensure smooth maintenance, modernization, and support of critical legacy systems in distributed teams.

Is mainframe developer a good career?

A mainframe developer is a skilled 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 technologies like COBOL and JCL. However, it requires specialized skills and ongoing learning to stay current with evolving systems and tools.

Can mainframe be replaced by AI?

Mainframe developers work with large-scale, legacy systems that require specialized knowledge of mainframe architectures, programming languages, and security protocols. While AI can automate certain tasks like code analysis and testing, it is unlikely to fully replace the need for skilled mainframe developers who maintain and optimize critical enterprise systems. AI tools may assist in development, but human expertise remains essential for complex mainframe environments.

How does a Remote Mainframe Developer typically collaborate with on-site teams and manage communication challenges?

As a Remote Mainframe Developer, you'll often work closely with on-site IT teams, business analysts, and project managers through virtual meetings, chat platforms, and shared documentation tools. Effective communication is key, so regular check-ins and proactive status updates help ensure alignment on project goals and troubleshooting efforts. Many companies use agile methodologies, which means you'll likely participate in daily stand-ups and sprint planning sessions remotely. While time zone differences can be a challenge, flexible scheduling and clear communication protocols are common strategies to keep everyone connected and productive.

What is the salary of a mainframe developer?

The salary of a mainframe developer typically ranges from $70,000 to $120,000 annually, depending on experience, location, and certifications. Senior developers with specialized skills in COBOL, JCL, and mainframe tools may earn higher salaries, especially in industries like finance and government that rely heavily on mainframe systems.

What is a Remote Mainframe Developer?

A Remote Mainframe Developer is a software professional who specializes in designing, developing, maintaining, and troubleshooting applications that run on mainframe computers, while working from a remote location. Mainframes are powerful computers often used by large organizations for critical applications, such as transaction processing and bulk data handling. Remote Mainframe Developers use programming languages like COBOL, JCL, and Assembler, and often connect to mainframe systems via secure networks. Their work ensures that legacy systems remain efficient, secure, and up-to-date. This role typically requires strong technical skills, experience with mainframe environments, and effective communication for collaborating with on-site teams.
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Remote Mainframe Developer jobs near you
Infographic showing various Remote Mainframe Developer job openings in Toronto, ON as of June 2026, with employment types broken down into 1% Locum Tenens, 1% As Needed, 88% Full Time, 9% Part Time, and 1% Contract. Highlights an 45% Physical, 6% Hybrid, and 49% Remote job distribution.

Senior Software Engineer, Product (Canada)

Centari

Toronto, ON • Remote

CA$130K - CA$190K/yr

Full-time

PTO

Posted 9 days ago

Be an early applicant

Job description

About Centari

At Centari, we believe that in high-stakes dealmaking, the competitive edge lies within unlocking your firm's private deal data. Centari is building the deal intelligence platform for the future of law and finance, moving beyond simple automation and into a world of data-driven dealmaking. Our proprietary Deal Reasoning Engine transforms a firm’s goldmine of complex documents into strategic insights, empowering global deal teams to negotiate with the full force of their organization’s collective knowledge.
Our platform spans M&A, credit finance, fund formation, and real estate. Every deal a firm runs through Centari makes the next one sharper, giving deal teams a clearer view of the market than anyone on the other side of the table.
Today, Ropes & Gray, Willkie, Fried Frank, Wilson Sonsini, and practices across the AmLaw 25 and Magic Circle rely on Centari. We're backed by GTMfund, Jeremy Kranz (former DoorDash board), Andy Appelbaum (Seamless), Jack Altman, South Park Commons, and Recall Capital.
We are drawn to complexity because that is where true innovation happens. If you’re a builder who thrives in ambiguity and operates with radical ownership, we’d love to meet you.
For more information, check out centari.com or find us on LinkedIn.

About the Role

We are hiring a Senior Software Engineer, Product to join our product team. You'll be a key player in designing and building end to end features, working alongside engineers who share a bias for action. As one team, you'll write code, shape the product, interact with customers, and drive initiatives from concept to completion.

Our systems are built with React/TypeScript and Go on the backend, leveraging cutting-edge LLM technologies across infrastructure, search, and persistence layers. If you're passionate about building impactful LLM applications and thrive on owning complex challenges, we want to hear from you. We expect this engineer to operate equally in the frontend and backend.

This is a primarily remote role. We operate out of Eastern Time.

Requirements

  • At least 5+ years of software engineering experience.

  • At least 2+ years of experience building production-ready applications in React.

  • At least 3+ years of experience building production-ready applications in Go or another strongly typed language.

  • Proven ability to work with cutting-edge technology and eagerness to learn new skills.

  • Willingness to roll up sleeves and get things done - our engineers are comfortable switching between different technical domains as needed.

  • Strong collaboration skills and ability to work effectively in a fast-paced environment.

  • Experience as a driving projects end to end.

Nice to have

  • Experience in enterprise SaaS or with highly regulated industries (e.g., legal, financial services, healthcare).

  • Experience in a startup environment.

What we offer

  • Build at the frontier of AI for knowledge work, with a highly engaged user base from top firms.

  • Flat organizational structure promoting autonomy and direct impact.

  • Meaningful equity in a high-growth startup.

  • Competitive salary

  • 100% remote. Flexible PTO.

Compensation Range: CA$130K - CA$190K