Episode Details

This story was originally published on HackerNoon at: https://hackernoon.com/how-we-rebuilt-photons-shared-imessage-routing-to-handle-10m-messages-a-day.
How we rebuilt Photon's shared iMessage routing to handle 10M+ messages a day — migrating Bun to Node, fixing a memory leak, and adding a Postgres event log.
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TL;DR: We rebuilt Photon's shared iMessage routing to handle 10M+ messages a day reliably. We migrated the runtime from Bun to Node.js to unlock OpenTelemetry tracing and kill silent gRPC failures, fixed a Promise.race memory leak that ballooned pods to 5 GB, corrected a binding-cache bug that silently dropped messages, and replaced per-request fan-out with a durable Postgres event log — deleting 5,207 lines of coordination code along the way.