DoorDash Sr. Software Engineer interview questions

For DoorDash interviews, focus on problem-solving clarity and structured communication. Explain your thought process, ask clarifying questions, and optimize for clean, efficient code. In system design, prioritize scalability and reliability. Show collaboration, ownership, and customer-focused thinking throughout.

The interviewer spoke very bad English and spent 10 minutes trying to explain the problem to me and and copy the problem into the into the Hackerrank session. The problem was to add some functionality to an existing 300-line python HTTP server using a framework I was not familiar with. I asked for clarifications on what the instructions were multiple times but was only given very vague answers. I implemented the code using the existing functions, but was told I did not do it right but did not provide any further instructions. After that I asked about their experience working at the company, it sounds like they regularly work on the weekends.