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DoorDash Software Engineer Interview Questions

The questions to prepare for a DoorDash Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~10htotal time
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1
CodingStart here. 12 questions · ~145 min
Two Sum and Linked List ReversalMedium
Practice

Use a hash map for Two Sum and pointer reversal to reverse a DoorDash delivery linked list.

two sumDoorDash
Binary Search LeetCode MediumMedium
Practice

Find the minimum DoorDash Drive capacity needed to deliver ordered packages within a fixed number of days using binary search.

binary searchleetcodeDoorDash
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2
System Design12 questions · ~145 min
Real-Time Store RecommendationsHard
Recently asked

Tests system design for real-time availability and dynamic delivery estimation at DoorDash scale.

real-time systemsDoorDash
Food Reviews With Reward CreditsHard
Recently asked

Assesses system design for DoorDash reviews, ratings, and engagement-based reward credit mechanics.

user engagementreal-time systemsDoorDash
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3
Execution12 questions · ~145 min
Reducing Long Dasher WaitsMedium

Assesses problem-solving for improving Dasher experience and operational performance.

Problem SolvingDoorDash
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4
Pipelines5 questions · ~60 min
Aggregate Data From Multiple APIsMedium

Assesses pipeline design for fan-out aggregation, timeouts, and failure handling.

error handlingDoorDash
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5
SQL & Data Manipulation5 questions + 3 drills · ~90 min
View Dasher Completion RecordsMedium

Assesses your SQL skills for aggregating and filtering DoorDash operational data.

DoorDash
7-Day Rolling Average ExportsMedium
Practice
Recently asked
Practice drill

Calculate a 7-day rolling average of Adobe Acrobat document exports using a window function.

Data AnalysisAggregationsAdobeAbbottOOura Ring
Top Merchants Per City SQLMedium
Practice
Practice drill

Use a join, aggregation, and ROW_NUMBER to find the top three DoorDash merchants by completed sales in each city.

sql queryData AnalysisAggregationsDoorDash
Top Merchants by CityMedium
Practice
Recently asked
Practice drill

Rank the top three DoorDash merchants per city by 30-day revenue using joins, aggregation, date filtering, and ROW_NUMBER.

Window FunctionsRankingAggregationsDoorDash
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6
Behavioral & Leadership3 questions · ~36 min
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7
More topics1 question · ~12 min
Debug Load Balancer RoutingHard

Assesses infrastructure debugging and ability to improve routing correctness and performance.

DebuggingDoorDash
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.