System Design · ByteDance · Hard
Below is a concrete, interview-ready design. I treat this as a two-sided marketplace problem: the intervention lands in the creator upload flow, but the value (and risk) shows up in viewer consumption, ads, and platform health. Experiment: default video length 15s → 60s 1. Unit of randomization and exposure rules Primary unit: the creator account (creator_id), not the device and not the viewer. The treatment is a default value in an editor UI — only the person who uploads…
Checking your access…