DoorDash·Software Engineer

DoorDash Software Engineer interview experience

Candidate report, summarized by Dataford

When I showed up for my DoorDash onsite, the structure was clear enough to anchor my prep: one coding round, a dedicated code refactoring round, and then a system design round that also doubled as the HM round.

I remember walking in thinking the coding portion would be the hardest part, but the refactoring slot quickly changed that.

The coding interview required me to implement something that ran and matched the expected behavior, while the refactoring round tested whether I could take an existing solution and improve it while staying correct. That second round felt different from “build from scratch”—I had to keep the code working as I reorganized it, and it put a spotlight on discipline, readability, and not breaking tests.

Then the system design/HM-style conversation pulled me toward explaining

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