Building a Producer-Consumer Queue with Redis and Haskell Using Hedis

TL;DR: We'll build a production-grade producer-consumer queue in Haskell using Redis as the message broker via the Hedis client library. By the end, you'll have a working system that can handle high-throughput job dispatch and consumption — the same pattern I used to process 1M+ payment refunds at Juspay. Why Redis for a Queue? When people think "message queue," they reach for Kafka or RabbitMQ. But Redis is often the right call when you need: Low latency — sub-millisecond enqueue/dequeue Simpli