# How We Rebuilt Photon's Shared iMessage Routing to Handle 10M+ Messages a Day

Page: https://stenobird.com/podcast/tech-stories-tech-brief-by-hackernoon-6365648/how-we-rebuilt-photon-s-shared-imessage-routing-to-handle-10m-messages-a-day
Text version: https://stenobird.com/podcast/tech-stories-tech-brief-by-hackernoon-6365648/how-we-rebuilt-photon-s-shared-imessage-routing-to-handle-10m-messages-a-day.md
Podcast: [Tech Stories Tech Brief By HackerNoon](https://stenobird.com/podcast/tech-stories-tech-brief-by-hackernoon-6365648)
Published: 2026-07-09T16:01:17+00:00
Episode link: https://share.transistor.fm/s/576f84f4
Audio file: https://media.transistor.fm/576f84f4/575f657d.mp3
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JSON: https://stenobird.com/v1/public/podcasts/tech-stories-tech-brief-by-hackernoon-6365648/episodes/how-we-rebuilt-photon-s-shared-imessage-routing-to-handle-10m-messages-a-day
Duration seconds: 1149

## Resource

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. Check more stories related to tech-stories at: https://hackernoon.com/c/tech-stories . You can also check exclusive content about #imessage , #messaging-app , #photon-imessage-api , #imessage-ai-agent-platform , #imessage-routing , #message-scaling , #postgres , #good-company , and more. This story was written by: @photonhq . Learn more about this writer by checking @photonhq's about page, and for more stories, please visit hackernoon.com . 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.

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