PayPal Clone – Microservices Architecture (Spring Boot, Java)

• Engineered a production-grade payment system backend mirroring PayPal’s architecture using Spring Boot and Java.
• Designed & deployed modular microservices (User, Wallet, Transaction, Notification, Fraud Detection, Rewards) with Docker containers.
• Implemented asynchronous communication using Kafka, JWT authentication, role-based access, and an API Gateway for secure routing.
• Applied Redis caching, Eureka service discovery, and centralized config server for scalable distributed infrastructure.
• Ensured code quality, scalability, and maintainability through rigorous testing, error handling, and system-level reasoning.