Experience
Key Responsibilities
Develop, maintain, and enhance mainframe applications.
Analyze business requirements and design technical solutions.
Write and test COBOL, JCL, and other mainframe code.
Debug and resolve application issues.
Optimize application performance.
Create and maintain technical documentation.
Collaborate with other developers, business analysts, and stakeholders.
Participate in code reviews.
Stay up-to-date on new mainframe technologies.
Programming Languages :
COBOL : Proficiency in COBOL is fundamental. This includes a deep understanding of COBOL syntax, data structures, and program control flow. Experience with different COBOL dialects (e.g., IBM COBOL, Micro Focus COBOL) is a plus.
JCL (Job Control Language) : Expertise in JCL is essential for submitting jobs, managing datasets, and controlling the execution of programs on the mainframe. This includes a thorough understanding of JCL syntax, parameters, and system commands.
REXX : Familiarity with REXX scripting language is helpful for automating tasks and interacting with the mainframe environment.
Database Management Systems :
Transaction Processing Systems :
Data Storage and Access Methods :
VSAM (Virtual Storage Access Method) : Understanding of VSAM file structures and access methods is important for working with mainframe data.
Sequential Files : Knowledge of sequential file processing techniques.
Operating System :
Essential Skills and Knowledge
SDLC (Software Development Life Cycle) :
Debugging and Problem Solving :
Performance Tuning :
Security :
Testing :
Documentation :
Soft Skills
Communication :
Teamwork :
Problem-Solving :
Adaptability :
Learning Agility :
Optional / Preferred Skills
DevOps :
Automation :
Cloud Integration :
Modernization :
Job Family Group : Technology
Job Family :
Applications Development
Time Type : Full time
Primary Location :
New Castle Delaware United States
Primary Location Full Time Salary Range :
$107,120.00 - $160,680.00
In addition to salary, Citi's offerings may also include, for eligible employees, discretionary and formulaic incentive and retention awards. Citi offers competitive employee benefits, including : medical, dental & vision coverage; 401(k); life, accident, and disability insurance; and wellness programs. Citi also offers paid time off packages, including planned time off (vacation), unplanned time off (sick leave), and paid holidays. For additional information regarding Citi employee benefits, please visit citibenefits.com. Available offerings may vary by jurisdiction, job level, and date of hire.
Most Relevant Skills
Please see the requirements listed above.
Other Relevant Skills
For complementary skills, please see above and / or contact the recruiter.
Anticipated Posting Close Date :
Oct 16, 2025
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.
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Citi is an equal opportunity and affirmative action employer.
Minority / Female / Veteran / Individuals with Disabilities / Sexual Orientation / Gender Identity.
Mainframe Programmer • New Castle, DE, United States