How to Design a Rate Limiter (A Complete Guide for System Design Interviews)

A real-world look at how to build scalable rate limiters — from simple array-based approaches to distributed systems design — and how to answer this popular interview question with confidence.

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Hello guys, If you’ve ever been asked “How would you design a rate limiter?” in a system design interview, you’re not alone. This question is a classic — it tests your ability to reason abou…