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# Senior Fiserv PEP Mainframe Developer

- **Company:** New York, Inc.
- **Location:** Union City, NJ, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Customer Information Control System (CICS), COBOL (Programming Language), IBM DB2, Job Control Language (JCL), Mainframes, Virtual Storage Access Methods, Transaction Processing (Computing)
- **Published:** October 2, 2026
- **Apply:** https://www.disabledperson.com/jobs/75686456-senior-fiserv-pep-mainframe-developer

## About the Role

* Strong Mainframe development experience COBOL JCL DB2 CICS VSAM

 * Hands-on expertise with Fiserv PEP

 * Solid knowledge of ACH payments NACHA formats and ACH processing workflows

 * Ability to troubleshoot payment failures processing bottlenecks and settlement reconciliation issues from both technical and functional perspectives

 * Strong analytical problem-solving and communication skills

## Description

* Experienced Mainframe Developer with strong expertise in Fiserv PEP and ACH Payments

 * Responsible for maintaining and enhancing the PEP application implementing technical and functional changes supporting production issues and ensuring smooth ACH transaction processing

Key Responsibilities:

 * Support maintain and enhance Fiserv PEP applications

 * Develop and implement technical and business driven changes using COBOL JCL DB2 VSAM and related mainframe technologies

 * Analyze and resolve ACH processing issues defects and production incidents

 * Understand end-to-end ACH payment flows settlement returns corrections and exception processing