Sr. Mainframe/AS400 Application Developer

Reposted 3 Days Ago
Be an Early Applicant
Toronto, ON
In-Office
76K-142K Annually
Senior level
Financial Services
The Role
Develop and maintain applications using COBOL and AS400 CLP in a hybrid environment. Drive software development lifecycle, optimize performance, and conduct testing. Collaborate with teams and address production issues.
Summary Generated by Built In

Application Deadline:

04/23/2026

Address:

250 Yonge Street

Job Family Group:

Technology

This is a hybrid role located in Toronto for Sr. Mainframe/AS400 Application Developer.

This person will recognize that a developer's success lies in the understanding of core processes of the business unit and its requirements, also aligning with the architecture patterns and technology strategy. Drives the overall software development lifecycle including working across functional teams to transform requirements into features, managing development teams and processes and conducting software testing and maintenance. Applies deep knowledge of algorithms, data structures and programming languages to develop high quality technology applications and services - including tools, standards, and relevant software platforms based on business requirements.

 

Roles & Responsibilities:

  • Conceive and write detailed software implementations/code while ensuring that their code/configurations adhere to the security, logging, error handling, and performance standards and non-functional requirements.

  • Writes, configures and integrates code to create the software that aligns with requirements, architecture patterns and technology standards

  • Decomposes business requirements and translates them into detailed design specifications and code.

  • Design, Develop, test, and maintain applications using COBOL, and AS400 CLP

  • Assesses impact of design decisions to the computer solution/product/service being developed (i.e. performance, schedule, budget, downstream component/system impact, quality, etc.) and recommends alternate/creative solutions for mitigation/optimization if required.

  • Analyze and Optimize application systems, monitor, track and enhance performance and addresses any issues (maintenance).

  • Supports production issues, includes independently completing root-cause analysis and diagnosis.

  • Participates and supports system and application audits.

  • Understands the implications of various components (including technology strategy & architecture) to the overall design of a program, system, or eco-system

  • Leads/conducts detailed code-reviews and provides feedback in a constructive manner.

  • Designs solutions, writes code, performs unit testing, develops appropriate artefacts / documentation, and facilitates final delivery.

  • Devises new algorithms and data structures for target environment and platform attributes in alignment with architectural patterns.

  • Recommends or automates approaches to streamline and integrate technological processes and/or systems to improve operational efficiency and effectiveness.

  • Supports the management of specific project deliverables & outcomes.

  • Works independently and regularly handles non-routine situations.

  • Perform Unit, Integration and regression testing to verify the functionality as per the project requirements or functionality of the mainframe systems

Qualifications:

  • Has 5-10 years COBOL experience, preferably in AS400 environment, and knowledge of Ingenium Insurance application.

  • Familiar with networking and integration of legacy systems with newer technologies, via APIs...

  • Knowledge of software development practices, concepts, and technology obtained through formal training and/or work experience.

  • Knowledge of creating documentations using JIRA and Confluence

  • Ability to understand testing requirement, prepare test plan, write and execute test cases

  • Understand functional aspects and technical behavior of the underlying operating system, development environment, and deployment practices.

  • Have facility with and understanding of the ecosystem that code operates in.

  • Good Verbal & written communication skills

  • Good collaboration & team skills

  • Analytical and problem-solving skills - In-depth.

Salary:

$75,900.00 - $141,900.00

Pay Type:

Salaried

The above represents BMO Financial Group’s pay range and type.

Salaries will vary based on factors such as location, skills, experience, education, and qualifications for the role, and may include a commission structure. Salaries for part-time roles will be pro-rated based on number of hours regularly worked. For commission roles, the salary listed above represents BMO Financial Group’s expected target for the first year in this position.

BMO Financial Group’s total compensation package will vary based on the pay type of the position and may include performance-based incentives, discretionary bonuses, as well as other perks and rewards. BMO also offers health insurance, tuition reimbursement, accident and life insurance, and retirement savings plans. To view more details of our benefits, please visit: https://jobs.bmo.com/global/en/Total-Rewards

About Us

At BMO we are driven by a shared Purpose: Boldly Grow the Good in business and life. It calls on us to create lasting, positive change for our customers, our communities and our people. By working together, innovating and pushing boundaries, we transform lives and businesses, and power economic growth around the world.

As a member of the BMO team you are valued, respected and heard, and you have more ways to grow and make an impact. We strive to help you make an impact from day one – for yourself and our customers. We’ll support you with the tools and resources you need to reach new milestones, as you help our customers reach theirs. From in-depth training and coaching, to manager support and network-building opportunities, we’ll help you gain valuable experience, and broaden your skillset.

To find out more visit us at https://jobs.bmo.com/ca/en.

BMO is committed to an inclusive, equitable and accessible workplace. By learning from each other’s differences, we gain strength through our people and our perspectives. Accommodations are available on request for candidates taking part in all aspects of the selection process. To request accommodation, please contact your recruiter.

Note to Recruiters: BMO does not accept unsolicited resumes from any source other than directly from a candidate. Any unsolicited resumes sent to BMO, directly or indirectly, will be considered BMO property. BMO will not pay a fee for any placement resulting from the receipt of an unsolicited resume. A recruiting agency must first have a valid, written and fully executed agency agreement contract for service to submit resumes.

Top Skills

As400
Cobol
Confluence
JIRA
Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
HQ: Toronto, Ontario
51,885 Employees

What We Do

At BMO, banking is our personal commitment to helping people at every stage of their financial lives.

The truth is, people’s needs change: so we change too. But we never change who we are. Which means we’ll never waiver from providing our customers the best possible banking experience in the industry.

Our incredible team of over 46,000 people is just the tip of the iceberg. You should get to know us. We’re here to help.

Similar Jobs

CrowdStrike Logo CrowdStrike

Consultant

Cloud • Computer Vision • Information Technology • Sales • Security • Cybersecurity
Remote or Hybrid
6 Locations
10000 Employees
135K-200K Annually

GPTZero Logo GPTZero

Product Engineer

Artificial Intelligence
In-Office
Toronto, ON, CAN

Applied Systems Logo Applied Systems

Senior Software Engineer

Cloud • Insurance • Payments • Software • Business Intelligence • App development • Big Data Analytics
Remote or Hybrid
Canada
3040 Employees
95K-145K Annually

Fluent, Inc. Logo Fluent, Inc.

Cloud Security Engineer

AdTech • Digital Media • eCommerce • Marketing Tech
In-Office or Remote
Toronto, ON, CAN
200 Employees
130K-170K Annually

Similar Companies Hiring

Amplify Platform Thumbnail
Fintech • Financial Services • Consulting • Cloud • Business Intelligence • Big Data Analytics
Scottsdale, AZ
62 Employees
Rain Thumbnail
Blockchain • Fintech • Payments • Financial Services • Cryptocurrency • Web3 • Infrastructure as a Service (IaaS)
New York, NY
100 Employees
Granted Thumbnail
Mobile • Insurance • Healthtech • Financial Services • Artificial Intelligence
New York, New York
23 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account