Designed a Production ready full-stack LLM chat platform with Spring Boot backend, Next.js frontend, and PostgreSQL + Redis for persistence and rate-limiting. Secured with JWT & Google OAuth, styled with Tailwind/Shadcn UI, and deployed via Docker, AWS, and GitHub Actions CI/CD.

Redis clone in Java with non-blocking NIO and RESP protocol. Supports 40+ commands, advanced data types (lists, streams, sorted sets), and features like persistence and master-replica replication. Built with an event-loop architecture for efficient concurrency.