Samhitha e
Mainframe Developer
- Role
- Senior Software Engineer at American Express
- Location
- Scottsdale, AZ, US
- LinkedIn followers
- 500 followers
Experience
Senior Software Engineer
Jun 2025 — Present · US
Worked in both development and production support roles, handling corporate credit card payments transactions, billing cycles, and hierarchy transfers for AMEX mission-critical applications. Designed, developed, and modified COBOL-DB2-IMS programs for transaction posting, bill generation, and customer hierarchy maintenance. Developed JCL scripts to automate batch processing for daily transactions, billing cycles, and financial reporting. Handled large-volume transaction files involving cardholder activity, payments, adjustments, and hierarchy transfers. Implemented VSAM dataset structures (KSDS, ESDS, RRDS) for storing card transaction history and billing records, ensuring optimized access and data integrity. Designed and implemented GDG structures for storing historical billing data, hierarchy audit logs, and transaction archives. Modified and enhanced JCL procedures to support new feeds, financial interfaces, and downstream reporting. Managed and scheduled batch jobs in CA7 for daily transaction posting, bill generation, and hierarchy updates, ensuring timely execution. Monitored job execution, performed troubleshooting of abends (S0C7, S0C48•••11, etc.), and implemented restart/recovery procedures to meet SLA requirements.
Education
Andhra University
Master's degree, Electrical, Electronics and Communications Engineering
2011 — 2016
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