Doordash | Onsite | 2024
Interview Experience
This is the Doordash full loop experience post for Backend Engineer (E4) Screening Round\: Question description as mentioned in this post -> https://leetcode.com/discuss/interview-question/1522955/Doordash-Onsite. **Full Loop: System Design Round\: Design a 3 - Day...
Full Details
This is the Doordash full loop experience post for Backend Engineer (E4)
Screening Round\: Question description as mentioned in this post -> https://leetcode.com/discuss/interview-question/1522955/Doordash-Onsite.
Full Loop:
System Design Round\: Design a 3 - Day Charity Event. This is a pretty standard doordash question and the focus was on scalability and reliability of the system.
Hiring Manager Round\: Basic behavioral questions on doordash engineering principles. There were a few situational questions to see how we approach a problem and direction of thinking.
Coding Round 1\: Question description as mentioned in this post -> https://leetcode.com/discuss/interview-question/1528907/doordash-phone-creen.
Follow up\: Print all the changes.
My thoughts\: Solved the question in time including the follow up. The interviewer was communicative and wanted to brainstorm the problem and the edge cases before diving into the code. I was able to solve the question and the follow up in time.
Coding Round 2\: This was a direct question from leetcode -> https://leetcode.com/problems/longest-increasing-path-in-a-matrix/description/.
Follow-up\: Print the longest path and then print all the paths that are strictly increasing.
My thoughts\: The interviewer rarely spoke and wanted me to write all the test cases as well. He wanted me to discuss the different approaches to the problem and also weight them before starting to code. I was able to solve the code and first follow up but ran out of time for the second one.
Overall experience\: The overall interview experience was great but they take a very long time to get back even after multiple followups with the recruiting manager. Recieved a rejection in the end for reasons unknown. All the best to everyone preparing for doordash interviews, I hope this helps.
About This Question
This is a candidate experience report from a doordash interview for a backend role (mid level) during the phone screen round reported in 2024.
It covers the following topics: System Design, Matrix, Dynamic Programming, Behavioral .
Difficulty rating: Easy
More DoorDash Interview Questions
About DoorDash Interview Reports
This question was reported by a candidate who interviewed at DoorDash. LeakCode aggregates interview reports from 10+ sources, including 1Point3Acres, Glassdoor, LeetCode Discuss, Blind, Reddit, Indeed, and Nowcoder. Each report is translated where necessary, deduplicated against existing entries, and tagged by company, role, round type, and reporting date.
Use this question as one calibration data point, not a memorization target. Companies typically rotate their question pools every 2-4 months; the exact wording of a 2024 question may differ from what you encounter today. The underlying pattern, difficulty level, and follow-up depth at DoorDash are the higher-signal extractions to take from this report.
For broader preparation context, the DoorDash interview process typically includes a recruiter screen, one or two technical phone screens, and a 4-5 round on-site loop covering coding, system design (at L4+ levels), and behavioral. Reports tagged on LeakCode show the round-by-round distribution and typical difficulty calibration. To browse questions filtered by round type and seniority, use the company hub linked above.
How To Practice This Type of Question
Solve similar problems on LeetCode under timed conditions (25-35 minutes per medium difficulty). The goal is pattern recognition: recognize the underlying technique (sliding window, two-pointer, BFS, memoized recursion, etc.) within 60-90 seconds of reading. Strong candidates verbalize their hypothesis out loud before coding, then iterate based on feedback. Weak candidates dive into implementation immediately, lose time on the wrong approach, and run out of time for follow-ups.
Companies update their question pools every 2-4 months. The exact wording of any given question may have been retired by the time you interview. Focus your prep on the pattern, not the specific problem. The patterns that appear in DoorDash reports consistently are the ones worth investing in; one-off niche problems are not.
During Your DoorDash Round
Apply the standard interview round template: clarify requirements (2-3 minutes), state your approach out loud and confirm direction with the interviewer (3-5 minutes), code with narration (15-25 minutes), test with concrete examples including edge cases (5 minutes), discuss optimization or trade-offs if time permits (5 minutes). This template is universally accepted across FAANG and adjacent companies; deviating from it produces weaker interviewer feedback signal.
The single most predictive failure mode in DoorDash reports tagged "no hire": not asking clarifying questions. Interviewers are explicitly trained to weight this. Strong candidates ask 3-5 clarifying questions even on problems that look obvious; weak candidates dive into code immediately. The clarifying-question check is often the first signal recorded in the interviewer's written notes.