DoorDash·Data Scientist

DoorDash Data Scientist interview experience

Not SpecifiedPosted Sep 2023 · Candidate report, summarized by Dataford

My first technical step was very SQL-forward and tightly timed.

I remember it as a choice between SQL and Python, but the structure was consistent: four SQL questions plus one Python task, all under a strict clock. The Python part asked me to compute a maximum sum over a window (using a sliding window idea) and return the start position using a 1-based index. The SQL questions were built from an ER diagram with tables for merchants, menus, orders, and dashers, and I had to work through tasks like assigning buckets, finding the top results, and calculating the share of vegetarian merchants among active merchants.

For the technical depth, I also had

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