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Real-time systemsMediumSDE-2

Customers want to watch their delivery partner move on the map. 500,000 partners are active and each phone sends GPS every 4 seconds. Design the real-time path.

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OlaRapidoSwiggyUberZomato

Think first

Answer out loud as you would in the room — clarify, give numbers, name the trade-off — then compare with the model answer.

Go deeper

Design shipment tracking for a logistics company (Delhivery) Lesson: Geospatial indexing: geohash, quadtrees and H3

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