HulkHire Tech
|Java Developer Intern
Hyderabad, Telangana, India
Summary
Led the architecture and development of a production-ready PayPal payment gateway integration system, focusing on secure REST APIs and microservices.
Highlights
Architected and implemented a production-ready PayPal payment gateway integration system utilizing secure REST APIs and OAuth 2.0 security.
Achieved 100% payment lifecycle completion by developing robust reconciliation logic, ensuring zero unsettled transactions and complete status tracking.
Improved API performance by 80% through Redis caching for access token management, optimizing system performance and reducing redundant PayPal authentication calls.
Built 3 resilient microservices for PayPal integration, incorporating circuit breakers and comprehensive logging for enhanced reliability.
Developed centralized error handling across 3 microservices with custom error codes and Spring AI integration, improving user clarity and reducing support inquiries.