How Notion Rebuilt Its Sync Engine for Offline-First
The CTO Podcast with Fexingo · 2026-06-24 · 11 min
Episode notes
Lucas and Luna dive into Notion's technical journey to rebuild its block-based sync engine for offline-first and real-time collaboration. They explore the architectural shift from optimistic local writes to a hybrid local-sync model, the challenges of conflict resolution with operational transforms, and how Notion handled state reconciliation for millions of users. Specific numbers: over 100 million blocks synced daily, sub-second latency for local writes, and a 40% reduction in sync errors post-migration. The episode also touches on the trade-offs between local-first and server-authoritative models, and what other builders can learn from Notion's engineering decisions. #Notion #OfflineFirst #SyncEngine #LocalFirst #OperationalTransform #ConflictResolution #RealTimeCollaboration #BlockEngine #Engineering #Architecture #TechLeadership #CTO #Business #Technology #FexingoBusiness #BusinessPodcast #Scaling #SoftwareEngineering Keep every episode free: buymeacoffee.com/fexingo
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