System Design

Webhook Delivery Engine with Worker Pools

System Design diagram · made in Skemio

Architecture diagram of a webhook delivery engine showing event broker, partitioned worker pool, retry queue with exponential backoff, customer endpoint, and dead letter queue.
Architecture diagram of a webhook delivery engine showing event broker, partitioned worker pool, retry queue with exponential backoff, customer endpoint, and dead letter queue.
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What it shows

  • Dedicated queues partition webhook deliveries to enforce tenant fairness
  • Exponential backoff with jitter prevents thundering herds on failed targets
  • Dead-letter queues collect exhausted attempts for manual client inspection

The takeaway

Isolate queues and workers by tenant latency so sluggish consumer endpoints cannot block fast ones.

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