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Delayed Queues and Dead-Letter Handling for Webhook Reservation Expiry in Node.js

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The article recommends using a delayed queue to trigger reservation expiry checks, with a retryable worker making the final decision on closing holds. It advises setting bounded consume timeouts, logging causes of slow webhooks, and routing persistent failures to a dead-letter queue rather than silently extending customer holds. This matters in fintech because lingering reservations can distort available balances, inventory, or payment intent states. The piece compares options including Amazon SQS, RabbitMQ, BullMQ with Redis, Inngest or Temporal, and REST-based scheduling layers, each with distinct operational trade-offs. It stresses that the expiry message serves only as a prompt to verify and safely close a reservation, not as the source of truth.

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