System Design Drill Day 13: Designing a Multi-Channel Notification System
Marketing starts a big campaign, and a few minutes later support starts hearing "I'm not receiving my OTP". The OTPs were queued fine. They're sitting in the same queue as the campaign, behind the who
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Seedance AI
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Great breakdown on decoupling priority queues from delivery providers. Handling provider-side rate limits and backpressure with exponential backoff and dead-letter queues is crucial when spikes hit.