Engineering 12 min read

Scaling SMS Throughput to 10,000 per Second

How we architected our SMS delivery pipeline to handle massive bursts of traffic during campaigns and elections.

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Aura
Dec 27, 2025 · 668 views
Scaling SMS Throughput to 10,000 per Second

The Challenge

During political campaigns and emergency alerts, SMS volume can spike 100x normal levels in minutes.

Our Architecture

  • Redis queues — Buffer incoming requests
  • Worker pools — Scale horizontally to process queues
  • Provider rotation — Distribute load across multiple telecom providers
  • Circuit breakers — Fail fast when providers are down
scaling sms infrastructure performance
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