Senior Mainframe Applications Developer

Job summary

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.

Job details

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. ------------------------------------------------------ Job Family Group: Technology ------------------------------------------------------ Job Family: Applications Development ------------------------------------------------------ Time Type: Full time ------------------------------------------------------ Primary Location Full Time Salary Range: $94,300.00 - $141,500.00 ------------------------------------------------------ Most Relevant Skills Please see the requirements listed above. ------------------------------------------------------ Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. ------------------------------------------------------ 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. ------------------------------------------------------ This job opening is for an existing job vacancy. ------------------------------------------------------ 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.

What you’ll do

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.

Benefits

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

Listed skills

• COBOL · Preferred
• Project management · Preferred

Other relevant skills

Identified from the job description. Confirm important requirements above.

• 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
• Hybrid Model
• Learning and Development Programs and Policies
• Planning
• Artificial Intelligence
• Application Development
• Business Process
• Decision Making
• Customer Information Control System (CICS)
• COBOL (Programming Language)
• Drawing
• Feasibility Studies
• Job Control Language (JCL)
• Systems Analysis
• Mainframe Computing
• Project Management
• Telecommuting
• Systems Design
• Writing
• Advising

Job areas

• Technology
• Software
• Finance & Accounting
• Consulting
• Mainframe Application Developer
• Application Developer / Engineer
• Software Developers

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