they literally asked me to design doordash. design a food delivery platform - the matching algorithm between orders, drivers, and restaurants. with real-time tracking, ETA prediction, and surge pricing. i was like... you want me to design YOUR product in 45 minutes? ok. honestly fun problem. the matching is essentially a bipartite graph optimization with time constraints. ETA prediction is a regression model on historical delivery data. got the offer

DoorDash E5 - system design was designing DoorDash lol

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they literally asked me to design doordash.

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every company asks you to design their own product lol. google asks design google maps. uber asks design ride matching. its because the interviewer knows the problem deeply

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the matching algorithm is the hard part. its not simple bipartite matching because you have temporal constraints (food gets cold), spatial constraints (driver location), and economic constraints (surge pricing)

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whats the TC for E5 at doordash? ive heard their RSUs have been volatile