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Design an alert notification system

System Design · DoorDash · Hard

Architect a multi-tenant incident-alerting platform that routes operational notifications from monitoring integrations to the appropriate human responders. Monitoring tools and external probes publish event records whenever a check starts failing or recovers. Each tenant can define alert rules, routing policies, on-call schedules, and escalation chains. The system must deliver notifications through one or more channels, including email, SMS, mobile push, chat integrations,…

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