Onsite

The Referral Chain Leaderboard Problem

RobinhoodSoftware Engineer · Onsite · Aug 2025

Robinhood's referral program is pretty well known. The task is to build a dashboard to track the state of the referral program, specifically to understand how people refer others through a referral chain. Assume a person refers everyone below them in the chain. For example, A refers B, C, and D in a referral chain A -> B -> C -> D. Build a leaderboard showing the top 3 users with the most referre…

Shared by a candidate · reported Aug 2025. Interview formats change; use it as a guide, not a script.