Real-time chat backend in Go. WebSocket messaging, Redis caching, JWT auth, PostgreSQL persistence. Built to explore distributed systems patterns at a practical level — caching, pub/sub fanout, idempotency, rate limiting — while keeping the codebase small enough to reason about.

A lightweight, concurrent, in-memory key-value database built in Go, implementing the RESP (Redis Serialization Protocol). It supports strings, list, stream, transactions. It also supports redis-like replication flow for basic leader/follower setups.