System Design · DoorDash · Medium
Hot Orders: Sliding-Window Restaurant Rankings Hard · Topics · Company Tags · Hints Design a streaming analytics service that processes a continuous feed of order events. Each event signals that a customer placed an order at a restaurant. The service must maintain a real‑time leaderboard showing the ten restaurants that received the most orders over the most recent one‑hour period. The leaderboard should refresh approximately once per second. Optionally, the system should…
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