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Roblox Interview Question Bank

Roblox interviews lean heavily on a small, stable repertoire of coding and system design prompts drawn from the company's own product surface — rate limiting, like-button counters, matchmaking queues, delayed payments. The bar is high but predictable: interviewers want bug-free implementations with crisp boundary handling and design discussions that ground every trade-off in real platform scale (millions of concurrent players, hot creator experiences, cross-region latency). HM and director rounds heavily probe past experience with comparable traffic and scope.

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Rate Limiter (Sliding Window) with Per-Entity Follow-up

The single most common Roblox phone-screen / OA coding problem: implement a sliding-window rate limiter that decides, request by request, whether each timestamped request would breach a `maxRequests` cap within a fixed `windowLength`. The follow-up generalizes the cap to be enforced independently per user and per experience (game), denying a request if either limit is exceeded.

SWE
MLE
Infra Eng
rate-limiting
sliding-window
hashmap
queue
+1
Last asked 2026-07-0913 related discussions

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