Design a Low-Latency Metrics and Alerting Platform
Company: Citadel
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Overview: Design a multi-tenant metrics and alerting platform for time-series ingestion, dashboards, SLO evaluation, and notifications with critical detection under two seconds. Cover cardinality controls, late data, heartbeat-based liveness, durable alert state, deduplicated delivery, retention, and regional failures.
Read the full Citadel Software Engineer interview experience this question came from