System design + working Go implementation of a Facebook/Instagram-style live comments backend: Postgres source of truth, sharded Redis Cluster pub/sub fan-out, SSE live tail, read-your-own-writes, keyset pagination.
redis golang distributed-systems real-time backend scalability postgresql redis-cluster pubsub sse server-sent-events live-chat fan-out system-design keyset-pagination system-design-interview live-comments
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Updated
May 30, 2026 - Go