Senior Mainframe Developer COBOL, CICS, DB2 Expert

LAKSHMIPATHY P

Buffalo Grove, Illinois

Phone: 224-***-**** Email: ************.****@*****.***

PROFESSIONAL SUMMARY

Senior Mainframe Developer with 14+ years of experience delivering high-availability, high- volume banking and payments systems for leading financial institutions including Wells Fargo, Fiserv, and BNY Mellon. Expert in COBOL, CICS, DB2, JCL, and VSAM with proven success in performance optimization, automation using REXX, and leading offshore teams. Strong domain expertise in Cards, Payments, Credit Processing, and Dispute Management systems.

CORE TECHNICAL SKILLS

Mainframe: COBOL, CICS, DB2, JCL, VSAM, Easytrieve Tools: Endevor, XPEDITOR, Intertest, Abend-Aid, File Manager, Fault Analyzer, QMF, SPUFI Integration: MQ, CICS Web Services

Scripting: REXX

OS: z/OS, MVS

Methodologies: Agile / Scrum

Domain: Cards, Payments, Credit Application processing system(ACAPS), Integrated Dispute system(IDS)

Modernization: AI assisted development (VS code)

PROFESSIONAL EXPERIENCE

Wells Fargo – Senior Software Engineer (Apr 2023 – Dec 2025)

- End-to-end ownership of COBOL/DB2 and CICS applications for ACAPS(Automated credit application processing system)

- Reduced CPU utilization by ~30% through performance tuning

- Built REXX automation saving 2–3 hours/day

- Integrated mainframe systems with MQ and Web Services

- Provided L3 production support and root cause analysis

- Leveraged AI assisted development tools in Visual Studio Code to accelerate code review and optimization

Fiserv – Technical Lead (Dec 2019 – Apr 2023)

- Led development and support for dispute processing systems (IDS) across Visa, MasterCard, and Amex networks

- Knowledge in Credit card chargeback processing

- Automated daily reports using REXX (100% manual effort reduction)

- Delivered performance optimization initiatives

- Provided L3 production support and root cause analysis

- Coordination with cross-functional teams to ensure timely delivery of releases. BNY Mellon – Technical Lead (Dec 2013 – Nov 2019)

- Developed Transfer Agency and Debit Card systems

- Created CICS modules and batch processes

- Worked on ESP scheduling and reporting tools

HCL Technologies – Software Engineer (May 2010 – Dec 2013)

- Migrated Hitachi mainframe applications to IBM

- Built conversion utilities using REXX

- Completed IBM DB2 fundamentals certification

EDUCATION & CERTIFICATIONS

B.Tech in Computer Science – JNTU Anantapur (2009) IBM DB2 V9 Fundamentals Certified

Microsoft Azure AZ-900 Certified

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