DoorDash Software Engineer interview experience

In the first coding round I calculated total payment from accepting an order through delivery, working through an inputs/outputs layout I and the interviewer aligned on. I also pulled data from a mock API to get dasher-related information, then discussed the shape of that data before writing the code, followed by tests and edge cases. Once the main implementation was done, I spent the remaining time fielding follow-ups.

Those follow-ups got more specific and stateful. When the problem evolved, I had to handle extra delivery states like when something is arrived versus picked up, and I was