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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Debug a Random Dasher PoolCalculate Dasher Pay with Concurrent Orders and Double-Pay IntervalsImplement Round-Robin and Consistent-Hashing Load BalancersDasher Pay with Peak TimeImplement a Bootstrap Service That Aggregates Multiple ServicesDAG-Based Order Workflow ServiceOrder Status DAG and Refund WorkflowResilient Bootstrap Aggregator APICalculate a Dasher's Active TimeDebug Random Dasher AllocationImplement Dasher Pay CalculationMinimum 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 Dishes