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Riot Games system design interview questions

One question on this site is reported in Riot Games software engineer interviews. Each is a guided run through requirements, back-of-envelope numbers, an interactive design, user flows and deep dives with interviewer follow-ups. Patterns covered: queues, scheduling, latency, gaming.

Attribution comes from public interview guides and candidate reports, not from Riot Games. It indicates where a question has been asked, nothing more.

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mediumqueuesschedulinglatencygaming

Design a Matchmaking System

Group online game players into fair, low-latency matches within seconds, at millions of concurrent players.

asked at
13 components5 flows5 deep dives
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How to prepare for a Riot Games system design interview

Large-company loops run 45 to 60 minutes, expect numbers, and spend most of the time on deep dives. Work each question above in practice mode until you can produce the requirements, the estimates and the flows without looking, then read the interview framework guide for how to structure the hour. The other questions on the site teach patterns that show up in Riot Games interviews under different names.