Process
I was approached by a recruiter, and then there was a technical screen.
My interviewer was okay; English was not their first language.
I came up with an algorithm that passed all the test cases. A few days later, I received a rejection with zero feedback or explanation.
Considering I solved a LeetCode hard problem, I am extremely upset that I was rejected. I would have been okay if there had been any feedback.
However, they have a company policy against it. ROFL, what?
Questions
Given a binary tree, find the maximum path sum from any two "alive nodes" within the tree. We can assume a node is an alive node if and only if it is a leaf node, indicated by an asterisk (*).
Example 1:
5
/
2 0
/ /
*25 *14 *15
Expected answer: 47 = 25 + 2 + 5 + 15
Example 2:
5
/
2 0
/ /
*100 *50 *4 *15
Expected answer: 152 = 100 + 2 + 50
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Interview Statistics
The following metrics were computed from 179 interview experiences for the DoorDash Software Engineer role in United States.
Success Rate
DoorDash's interview process for their Software Engineer roles in the United States is extremely selective, failing the vast majority of engineers.
Experience Rating
Candidates reported having mixed feelings for DoorDash's Software Engineer interview process in United States.
DoorDash Work Experiences
- 4.0Interesting work depends on the teamSoftware Engineer • Current EmployeeToronto, Ontario, CanadaOctober 29, 2025Pros: Work is interesting. Smart and helpful coworkers. Stock price appreciation.Cons: Intense workload and short deadlines
- 4.0Good Balance, Independent TeamsSoftware Engineer • Current EmployeeSeptember 9, 2022Pros: Lots of work-life balance.Cons: Teams are super independent and difficult to get hold of if you’re in a horizontal.
- 5.0A good ride at DoorDashSoftware Engineer • Former EmployeeSan Francisco, California, United StatesFebruary 5, 2025Pros: I was able to join before the IPO. Although the stock dipped for a few years, it is back up to where we started. I'm optimistic that the market cap can continue to grow.Cons: As the company has grown, it is no longer as agile as it used to be. Sometimes for good reason, to avoid large losses in revenue, but sometimes for no good reason, as when a solution is available but not adopted by development teams due to conflicting priorities and timelines.
DoorDash Interview Questions
