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Application Development Sr Programmer - Mainframe Developer

Citigroup

$96,960 - $145,440
Sep 16, 2025
Jacksonville, FL, USA
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Citi is looking to solve the business problem of supporting card issuance and customer communication systems by developing and enhancing applications related to Fulfillment Operations, Plastics, and Digital communication channels.

Requirements

  • Strong Mainframe expertise: z/OS, COBOL, JCL, CICS, MVS, VSAM, DB2, REXX/CLIST, Connect:Direct (NDM)
  • Experience with SQL Server, Oracle, JAVA, JavaScript
  • Proficiency with modern mainframe and distributed IDEs and tools: IDz/RDz, Rational Team Concert, z/OS connect, Bitbucket, Jenkins
  • Working knowledge of debugging tools and application monitoring: Interest, IBM Debug, Omegamon
  • Experience working in a CICSPLEX/SYSPLEX environment
  • Knowledge and experience in UNIX or Linux and Open Text Exstream
  • Experience with business-critical, high-volume, and complex enterprise systems

Responsibilities

  • Analyzing, designing, coding, and implementing solutions
  • Integrating diverse data feeds into SQL ETL processes
  • Supporting both Agile development methodologies, with Knowledge of Waterfall
  • Contributing to the evolution of the Payment Device Data Repository (PDDR) and its interfacing systems
  • Leading analysis, design, planning, and Sprint oversight
  • Developing and integrating microservices and Next Gen Architecture (NGA)
  • Building and integrating data feeds into SQL databases (DB2, Oracle, SQLServer)

Other

  • Ability to work effectively with remote teams across geographies and organizational lines
  • Strong team player who can motivate others, handle multiple demands, manage changing priorities, and meet tight deadlines
  • Collaborative and adaptable, with excellent communication skills
  • Prior experience working on Agile teams using Scrum methodology is preferred
  • High School diploma, Associate degree, or Bachelor's degree in a relevant field (e.g., Accounting Information Systems, Computer Technology, Computer Information Systems)