Design DoorDash (Food Delivery)
Hard · System Design · about 45 minutes
Asked at DoorDash, Instacart, Uber, Lyft, Palantir, Amazon, Toast, Grab, Swiggy.
Design a food delivery platform like DoorDash. Customers order from nearby restaurants, restaurants accept and prepare the food, and a courier is assigned to pick it up and deliver it while the customer tracks them live. Assume ~20M orders per day (~1k per second at dinner peak) and ~1M couriers online sending locations every few seconds.