Mainframe Application Developer COBOL / DB2 / JCL
Location: Chicago, IL Area
Work Arrangement: Hybrid
Employment Type: W2 Only
Rate: Depends on Experience
Experience: 5+ Years
Availability: Immediate / Short Notice Preferred
Job Overview
We are seeking an experienced Mainframe Application Developer to support enterprise applications within an IBM z/OS environment.
The ideal candidate will have strong hands-on experience with COBOL, JCL, DB2, IMS, VSAM, CICS, and TSO/ISPF . This position involves application development, enhancement, testing, debugging, production support, and troubleshooting in a large-scale Mainframe environment.
Key Responsibilities
Develop, enhance, maintain, test, and debug Mainframe applications.
Design and implement application solutions based on business and technical requirements.
Develop and maintain COBOL programs and related Mainframe components.
Create, modify, execute, and troubleshoot JCL and batch jobs .
Work with DB2 and IMS/DB databases.
Develop and support online applications using CICS and/or IMS/DC .
Work with VSAM files and datasets .
Perform application testing, debugging, code validation, and implementation activities.
Troubleshoot application issues, batch failures, and production incidents.
Perform root-cause analysis and assist with production issue resolution.
Monitor and improve application and batch-processing performance.
Maintain technical documentation related to application changes and support activities.
Collaborate with development, QA, database, infrastructure, and business teams.
Required Skills
5+ years of professional experience in Mainframe Application Development .
Strong hands-on experience with COBOL .
Strong experience with JCL and Mainframe batch processing.
Experience working in IBM z/OS environments.
Hands-on experience with DB2 .
Experience with IMS/DB .
Experience with VSAM .
Experience with CICS and/or IMS/DC .
Working knowledge of TSO/ISPF .
Strong debugging, troubleshooting, and problem-solving skills.
Experience supporting enterprise production applications.
Preferred Skills
Experience with REXX .
Exposure to PL/I or Assembler .
Experience with large-scale enterprise Mainframe applications.
Experience with both batch and online transaction processing .
Familiarity with enterprise development, testing, release, and change-management processes.
Candidate Profile
We are looking for a hands-on Mainframe Developer who can work across the application lifecycle, including development, testing, debugging, production support, and issue resolution.
Candidates with strong experience in COBOL, JCL, DB2, CICS/IMS, z/OS, and VSAM are encouraged to apply.
Work Location
Chicago, IL Area Hybrid
Candidates located in the Chicago metropolitan area or within reasonable commuting distance are preferred.
Employment
W2 Only
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