Buckweed – AI Expense Processing System
Designed and built a scalable event-driven backend using Spring Boot and Apache Kafka, processing 1,000+ transactions per day. Developed RESTful microservices with JPA/Hibernate and MySQL, reducing API response time by nearly 30% through query optimization and indexing. Implemented Spring Security with JWT authentication and structured exception handling. Containerized services with Docker, configured Kong API Gateway, and deployed on AWS EC2.