FlowPay
GogRPCKafkaPostgreSQLDocker
Event-driven payment system with idempotent processing and Kafka-backed state machine
Production-grade Go systems - each with a full system design writeup.
Event-driven payment system with idempotent processing and Kafka-backed state machine
Distributed webhook dispatcher with worker pool, retries, and job lifecycle tracking
Layered architecture with Redis caching, TTL management, and click analytics
Token bucket rate limiter middleware — thread-safe, O(1), tested with Go race detector