Design a Top Dasher experiment with interference

Company: DoorDash

Role: Data Scientist

Category: Analytics & Experimentation

Difficulty: easy

Interview Round: Onsite

Quick Answer: Practice designing an interference-aware experiment for a Top Dasher incentive program in a delivery marketplace. The solution covers goal setting, zone-time metrics, switchback design, clustered analysis, guardrails for non-eligible couriers, and how to reason about false positives and false negatives.