DoorDash Interview Question Bank
DoorDash's loop is dominated by a small, slow-moving library of original Code Craft prompts (Dasher Pay, Bootstrap API, Round Robin debugging) plus a handful of recurring system-design favorites (3-day Donation, Notification, Food Review). Coding bar is the gate; system design correctness and behavioral consistency drive leveling. The bar swings sharply with the interviewer — multiple candidates report bug-free coding rounds that still ended in rejection — so prepping the canonical question set cold matters more than chasing breadth.
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OJ Problems
practice in the online judgeMinimum Deletions to Make a Parentheses String ValidFirst Unique Restaurant ID in an Order StreamMinimum Rider Processing SpeedFilter Open Restaurants Within a City RangeBootstrap API Aggregating User, Payment, and Address ServicesBuild a Local Refund Workflow ServiceDebug a Random Dasher PickerImplement and Debug a Random Dasher PickerNearest DashMartDasher Pay: Calculate Active-Time PaymentRefund Workflow Engine on a DAGOrder Assignment with Round Robin and Consistent HashingDasher Pay with Peak-Hour MultiplierRefund Decision Tree EvaluationOrder BatchingDasher PayValidate Shopping CartCalculate Dasher Pay With Cancellations and Double-Pay WindowsMaximize Total Profit by Assigning Chefs to DishesCalculate Dasher Pay from Delivered OrdersDistance to Nearest Destination on Grid (Including Obstacles)Compute Dasher Daily Payment from Order Events (with Peak Hour Rate Doubling)Debugging a Load Balancer Implementation and Add Round-Robin RoutingCode Craft: Aggregate Data from Multiple Mock APIs with Retries and TestsMulti-Source BFS: Nearest Source for Each Cell in a GridPeak Hour Double PayDriver Pay With In-Store Waiting (ARRIVED/PICKED_UP is exclusive)Driver Pay From Order Status Timeline (overlapping orders, minute-based)AI Coding: Workflow Engine for Delayed Delivery Refunds + AI-generated TestsDebugging: Dasher Map (HashMap init / NullPointer / key swap bugs)