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Building Resilient CPaaS Webhooks: Handling Idempotency, Retries & High-Throughput DLQs

Architecting webhook listeners to ingest 10,000+ delivery status receipts per second without database lockups, duplicate notifications, or dropped state transitions.

AT
Architecture Team Lead Solutions Architect @ Qsura • Published Aug 30, 2026 • 9 min read
Building Resilient CPaaS Webhooks: Handling Idempotency, Retries & High-Throughput DLQs

High-Throughput CPaaS Webhook Architecture

When sending millions of messages during marketing campaigns or authentication spikes, receiving delivery status notifications (DLRs) requires resilient queueing architectures.

Learn how to design consumer queues using Redis/Kafka, enforce idempotency keys, handle exponential backoff retries, and route poisoned events to Dead Letter Queues (DLQs).

AT

Written by Architecture Team

Solutions Architect at Qsura. Specializing in high-throughput enterprise CPaaS infrastructure, TRAI DLT regulatory compliance, and omnichannel customer communication workflows across India.

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