Onsite

System Design, a Dasher Debugging Round, and an AI Pair-Programming Round

DoorDashSoftware Engineer · Onsite · Apr 2026

SD round - from the prep notes, a food review system. Debug round - also from the prep notes. The question was about adding a dasher and randomly picking a dasher. The bugs included, roughly: A boundary issue when the map is empty A logic issue: when you delete a randomly-selected key from the map, you need to move the last element into the deleted slot and update the index. If you don't handle t…

Shared by a candidate · reported Apr 2026. Interview formats change; use it as a guide, not a script.