@kodekloud: System Design: Scaling Webhooks to 10 Million Events/Day! #shorts Designing a webhook system to reliably send 10 million events a day means preparing for external server failures. The naive approach - POSTing directly from your live application logic - loses data entirely if a customer's server drops or times out. The fundamental fix is the Transactional Outbox pattern: write the event to a database first to guarantee durability before any delivery attempt. However, a single slow customer endpoint will quickly exhaust a standard worker pool, creating a massive bottleneck that stalls notification delivery for everyone else on the platform. To prevent this, implement a fair-share dispatcher that routes traffic into isolated, per-customer lanes so one choked endpoint cannot block the rest of the pool. Workers execute these isolated jobs using short timeouts, cryptographically signing payloads with an HMAC key so clients can verify authenticity, and applying exponential backoff for temporary network blips. If all automated retries exhaust, the event is triaged to a Dead Letter Queue (DLQ) and exposed via a replay dashboard, allowing users to manually re-fire the webhook once their systems are back online. #SystemDesign #Webhooks #BackendDevelopment #SoftwareArchitecture #DistributedSystems #Scalability #StripeTech #DevOps #CloudComputing #Database #CodingTips #Microservices

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Thursday 04 June 2026 13:51:33 GMT