Sudheer Kumar Puppala
Senior Software Engineer @CBTS | Ex- SDE @ZopSmart | Golang | Microservices | Databases
- Role
- Engineer Ii at American Express
- Location
- Hyderabad, TG, IN
- LinkedIn followers
- 500 followers
About Sudheer Kumar Puppala
Experienced Software Engineer with 4 years of expertise in developing and implementing…
Experience
Engineer Ii
Oct 2024 — Present · Bengaluru, IN
Designed and implemented a microservice to extract and transform Indian market data (accounts, pointsbank, offers, status benefits, lounge access, etc) and migrate it to Fiserv in a specified format, complying with RBI Guidelines 2025• Improved system throughput by 50% by combining ANT’s worker pool mechanism with PostgreSQL’sLISTEN/NOTIFY for efficient event-driven processing across Multi pod mechanism, enabling real-time handling of concurrent customer data updates.• Enhanced PostgreSQL efficiency by 45% using PGX connection pooling and pgx.Batch for high-performance batch insertions and updates.• Encrypted and decrypted sensitive customer card data using Format-Preserving Encryption (FPE) algorithms published by American Express, ensuring compliance rules.• Integrated APIs to fetch and enrich benefit partner enrollment data for Indian cardholders, including partners like Hilton Honors, Radisson, and Marriott.• Automated secure data exchange through Secure File Transfer Protocol (SFTP) for both file-based workflows and API interactions.• Resolved critical P0/P1 production issues related to customer account management, reducing system down-time by 25% and ensuring uninterrupted service delivery.
Education
Viswabharathi High School
Secondary Education, Secondary Education
Indian Institute of Information Technology, SriCity
Bachelor of Technology - BTech, Computer Science
2018 — 2022
Narayana Junior College - India
Higher Secondary Education
2016 — 2018
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