System Design · Roblox · Medium
Design the backend matchmaking layer for a large-scale multiplayer gaming platform. A player picks a game type, enters a queue, and the system assembles groups of similarly skilled players into lobbies of approximately 100 participants before transferring each lobby to a game server. The fundamental design challenge is trading off match fairness against player wait time: narrow skill bands produce balanced matches but slow lobby formation, while broad bands fill quickly but…
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