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Food Delivery System Design
Visual Problem Diagram
Scenario
Dinner rush: 8K orders/minute in one city, only 200 drivers online, and three apps show the same restaurant 25 min ETA while food sits 45 min. Matching eaters, restaurants, and couriers with honest ETAs and no double-assign on drivers is the marketplace interview—not drawing a burger icon.
Design a food delivery platform connecting customers, restaurants, and delivery drivers with order tracking and ETAs. The hard parts are supply-constrained dispatch, kitchen prep uncertainty, and consistent order state across three apps.
You should support menu browse, order placement, restaurant acceptance, driver matching, live tracking, and payment hooks. Be ready to explain geo dispatch, state machine, and peak-hour degradation.
Constraints
Browse menus, place order, restaurant accept/prep, driver match and pickup, track delivery, payments hook
< 5 min quoted ETA accuracy band, 99.9% order path availability, idempotent place order
50M users, millions orders/day, city-level peaks, thousands drivers per metro
Stages ahead
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