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Citi Logo Citi · IT - Software Development

Mainframe Developer

India, Chennai · Job Posted June 09, 2026
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Job Description

We are seeking a talented and motivated Mainframe Developer with 2.5 to 4 years of professional experience to join our dynamic team. The ideal candidate will be responsible for designing, developing, testing, and maintaining critical applications on our mainframe systems. This role requires a strong understanding of mainframe technologies, programming languages, and a commitment to delivering high-quality, efficient solutions.

Job Responsibility

  • Design, code, and implement new applications or enhancements to existing mainframe systems using COBOL, JCL, DB2, and CICS
  • Perform routine maintenance, debugging, and troubleshooting of mainframe applications to ensure optimal performance and reliability
  • Optimize mainframe applications for performance, efficiency, and scalability
  • Develop and execute unit, integration, and system tests to validate application functionality and data integrity
  • Create and maintain comprehensive technical documentation, including design specifications, program flows, and operational procedures
  • Work closely with business analysts, project managers, and other developers to understand requirements, define solutions, and resolve technical issues
  • Diagnose and resolve production incidents and problems in a timely manner
  • Participate in code reviews to ensure adherence to coding standards, best practices, and system architecture

Requirements

  • 3+ Years of total experience
  • Strong proficiency in COBOL
  • In-depth knowledge and hands-on experience with Job Control Language (JCL)
  • In-depth knowledge and hands-on experience with DB2 (Database 2)
  • In-depth knowledge and hands-on experience with CICS (Customer Information Control System)
  • In-depth knowledge and hands-on experience with VSAM (Virtual Storage Access Method)
  • In-depth knowledge and hands-on experience with TSO/ISPF (Time Sharing Option/Interactive System Productivity Facility)
  • Experience with mainframe utilities, debugging tools, and version control systems (e.g., Endevor, Changeman)
  • Familiarity with z/OS
  • Excellent problem-solving and analytical capabilities
  • Strong written and verbal communication skills
  • Ability to work effectively in a collaborative team environment
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