DoorDash Software Engineer Interview Questions
247+ questions from real DoorDash Software Engineer interviews, reported by candidates.
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Doordash phone screen
// # A DashMart is a warehouse run by DoorDash that houses items found in convenience stores, grocery stores, and restaurants. We have a city with open roads, blocked-off roads,...
Doordash phone screen
We want to implement an in-memory tree key value store for Doordash Restaurant Menus. Definitions: - path is a / separate string describing the node. Example /Tres Potrillos/tacos/al_pastor - Values are all strings API...
Doordash Onsite Interview
Screening Interview: a variant of max binary tree path sum: https://leetcode.com/problems/binary-tree-maximum-path-sum/description/. The difference was the paths could only start and end at leaves and the follow-up question was to get...
Doordash Phone Screen
You are given a list of locations connected by roads, each with a designated beauty value and travel time. Starting at location 0 (the source), your goal is to traverse...
DoorDash Phone Interview
Got to interview at doordash, I would say the interview didnt explain this very well and there was some accent barrier so I had a hard time understanding what exactly...
DoorDash Phone Interview
First question : Validate order list : P1, P2, D2,D1 Pick are ascending order and delivery can be any order Solved it completely and correctly Second Question : Given number of order return all...
Doordash Phone Screen
I got following sum for my phone interview. https://leetcode.com/discuss/interview-question/1367130/Doordash-Phone-Interview I asked following clarifying questions would the keys repeat? what is the input? would the input root node in the new tree...
Link: https://careersatdoordash.com/blog/doordash-is-rebuilding-its-engineering-interviews-around-ai/ What are people’s thoughts on this?
The question concerned payer salaries, primarily requiring the ability to test the final result and the use of a good OOP pattern. While writing my answer, I felt all the assumptions I made to the exa
DoorDash Onsite
Coding Round 1: Two Variations of https://leetcode.com/problems/count-all-valid-pickup-and-delivery-options/ 1. Given array of pick up and delivery options, make sure that the array is valid. Example 1: Input: [\'P1\', \'D1\'] Output: True Explanation: P1 comes...
DoorDash Onsite
Phone Screen: https://leetcode.com/problems/employee-free-time/ Onsite: First coding round: https://leetcode.com/problems/valid-sudoku, and https://leetcode.com/problems/sudoku-solver/ Second coding round: https://leetcode.com/problems/analyze-user-website-visit-pattern/ Follow up: If you cannot store that data on a single machine, and you have very large data - how...
DoorDash | Onsite | Design a Donation App
Say if DoorDash along with other partners across US is sponsoring for 3-day charity event where huge partipation of more than 3 million customers are expected to participare and simply...
DoorDash Senior Engineer Interview: Code Craft and System Design
For doordash, the code craft interview is a bit tricky and different. But luckily it has a small question bank and I think only 2 questions so I was able to practice both of those questions on a websi
Doordash phone screen yay or nay ?
I recently had a phone screen - codecraft with doordash. While I took time to do data modelling and also get the class structure in place, I couldn't implement everything. I had to implement 6 classes
Doordash Machine Learning Engineer Internship Tech Phone Screen Interview Experience
There were two rounds in total. The first round involved detailed explanations of past projects, including behavioral questions (presenting a challenging but unsuccessful project and a challenging but
I had an interview for an Infrastructure position at DoorDash in early September. The interviewer was a European guy. The questions were unlike anything I'd seen in interview logs, but they were actua
I went to the nearest DashMart for the coding interview. I was interviewed by a middle-aged white man with a strong classmate vibe; there wasn't much interaction during the interview. SD asked us to d
Fresh interview experience, posted right after the interview! I've also included my solutions, the interviewer's test cases, and a runnable setup. Please share other interview experiences, thank you!
DoorDash Fulltime SDE Tech Phone Screen Experience
I got a referral from someone online, and I'm very grateful to him. I was rejected immediately after applying before, but this referral led to an interview. Timeline: September 17th referral, Septembe
The first round phone interview lasted one hour. The interviewer was an enthusiastic young white man. A quick check on LinkedIn revealed a strong background and academic record. The question and solut
What DoorDash Looks for in Software Engineer Interviews
DoorDash Software Engineer interviews are calibrated against the level and scope expected of the role. Across 247+ verified candidate reports on LeakCode, the consistent signals interviewers look for: clear problem decomposition before coding, explicit complexity reasoning, structured handling of edge cases, and the ability to articulate trade-offs between two reasonable approaches.
The discriminator between candidates who advance and candidates who do not is rarely the final correctness of the solution. It is the path to the solution: did you ask clarifying questions, did you state your approach before coding, did you handle edge cases without prompting, and did you communicate your reasoning throughout. Reports tagged "no hire" frequently cite a working solution with poor communication; reports tagged "strong hire" cite clear thinking even when the final solution was incomplete.
How To Use This Question Set
Real interview reports are a calibration tool, not a memorization target. Companies update their question pools every 2-4 months; memorizing exact problems risks misleading you when the interviewer uses a variant. The high-leverage use: identify the patterns that appear repeatedly in DoorDash Software Engineer reports, practice those patterns on similar (not identical) problems, and use the reports to understand the interviewer's typical follow-up depth.
Filter the questions below by round type, difficulty, and recency. Focus first on reports from the past 6-12 months; older reports may reference questions that have since rotated out of DoorDash's pool. Reports tagged with quantified difficulty (e.g., "medium-hard") are higher-signal than reports without difficulty tags.
Round-by-Round Expectations
DoorDash Software Engineer loops typically span 4-6 rounds across phone screens and on-site or virtual on-site interviews. The structure varies by company: some run 1 recruiter screen + 1 technical phone + 3-4 on-site rounds; others run 1 recruiter screen + 1 OA + 4-5 on-site rounds. The recruiter screen is logistics and culture-light; the technical phone screen is medium-difficulty coding; the on-site loop covers coding, system design (at L4+ levels), and behavioral rounds.
Each round is designed to surface a specific signal. Coding rounds: correctness, code quality, complexity reasoning, communication. System design rounds: requirements clarification, design judgment, operational thinking. Behavioral rounds: ownership scope, leadership, ambiguity tolerance, conflict navigation. Strong candidates explicitly hit each signal dimension out loud during the round; weak candidates focus only on solving the prompt.
Common Interview Mistakes At This Combination
Reports tagged "no hire" at DoorDash Software Engineer commonly cite: jumping into code without clarifying requirements, coding silently for 10+ minutes without verbalizing approach, missing edge cases (empty input, single element, very large input, overflow), and producing a working solution that the candidate cannot explain or refactor when probed. Strong candidates avoid these patterns by following a consistent template: clarify, verbalize approach, code with narration, test with examples.
Behavioral and design rounds have their own failure modes. Behavioral: stories that use "we" instead of "I" diluting individual signal, stories with no quantified outcome, defensiveness when probed about failure. Design: not asking clarifying questions, not stating requirements out loud, designing for a single server when the prompt clearly implies scale, ignoring operational concerns (deployment, monitoring, rollback). These show up in roughly half of DoorDash Software Engineer interview retrospectives on LeakCode.
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