You are developing an online game where 2 users can play against each other.
We want to create a service which will match users with similar ranks so that they have good experience in competing.
Design a system which can help to build this matching service.
This problem asks you to design a matchmaking service for a two-player online game, with the goal of pairing users of similar rank to ensure a fair and enjoyable experience. A strong solution typically discusses how to ingest match requests, organize players by rank, search efficiently for a suitable opponent, and handle waiting queues, timeouts, and concurrency. Common approaches use a priority queue, balanced search structure, or rank buckets, often combined with progressively relaxed matching rules to balance fairness and latency.
