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Citi

Senior Mainframe Applications Developer

Mississauga, ON, Canada

$94,300.00 - $141,500.00 · Full-time

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Applications open in a new tab.

Job details

Pay: $94,300.00 - $141,500.00
Job type: Full-time
Experience: 5 to 8 years of experience in systems analysis and applications development.
Posting language: English
Posted: Oct 5, 2026

Original job description

As a Senior Mainframe Applications Developer, you will build, test, and support critical mainframe applications using COBOL, JCL, and CICS, directly shaping how Citi's technology platforms serve its business users. This role sits within Citi's Technology team, where you will take ownership of the full development lifecycle, from design through implementation, while advising teams on best practices. You will work with a high degree of independence, acting as a go-to specialist for complex application challenges.

Responsibilities

Design and build new or revised mainframe applications using COBOL, JCL, and CICS to meet specific business needs.

Lead feasibility studies, time estimates, and cost estimates to support technology planning decisions.

Manage every phase of the development lifecycle, including analysis, design, construction, testing, and implementation.

Provide ongoing operational support to business users on live applications.

Analyze complex system and business process issues, drawing on in-depth application development expertise to resolve them.

Develop security measures following implementation reviews to strengthen system design and functionality.

Advise clients and other technology teams on programming solutions and support the rollout of customer-facing systems.

Coach junior developers and help define development standards for the wider team.

Required Qualifications & Skills

5 to 8 years of experience in systems analysis and applications development.

Hands-on experience building and maintaining applications with COBOL.

Hands-on experience writing and managing JCL scripts.

Practical experience developing with CICS.

A track record of managing and delivering successful technology projects.

Working knowledge of project management and consulting techniques.

Ability to manage shifting priorities and tight deadlines without losing focus on quality.

Bachelor's degree or equivalent practical experience.

Education:

Bachelor’s degree/University degree or equivalent experience

What We Offer

Join a technology team where your mainframe expertise directly supports systems used across the business, and where your growth is matched by real ownership of projects.

Work in a hybrid model with 3 days in the office and 2 days working remotely.

Gain exposure to large-scale systems and global technology teams.

Access structured learning and development programs to grow your technical skills.

Benefit from financial wellbeing programs and resources that support long-term planning.

Work in an environment that supports a sustainable balance between career and personal life.

Build and support the mainframe systems that keep Citi's business running by applying today.

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Job Family Group:

Technology

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Job Family:

Applications Development

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Time Type:

Full time

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Primary Location Full Time Salary Range:

$94,300.00 - $141,500.00

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Most Relevant Skills

Please see the requirements listed above.

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Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.

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More about this job

Responsibilities

Design, build, and maintain critical mainframe applications using COBOL, JCL, and CICS while managing the full development lifecycle. Provide operational support, lead technical planning, and mentor junior developers to ensure high-quality system delivery.

Requirements

Requires 5 to 8 years of experience in systems analysis and applications development with hands-on expertise in COBOL, JCL, and CICS. A bachelor's degree or equivalent practical experience is mandatory for this role.

Skills

Cobol
Jcl
Cics
Systems analysis
Applications development
Project management
Consulting
Software design
Technical leadership
Operational support
Security measures
Mentoring
Mainframe development
Feasibility studies
Cost estimation

Benefits

Hybrid work model
Structured learning and development programs
Financial wellbeing programs
Work-life balance support

Visa sponsorship

Not detected in the job text

Keywords

Mainframe
Cobol
Jcl
Cics
Systems analysis
Applications development
Project management
Consulting
Technical planning
Operational support
Security
Mentoring
Technology
Hybrid work
Financial services
Enterprise systems

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