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Design walkthroughs
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7 min readDesign walkthroughs
Design Google Docs: Back-of-the-Envelope Estimates
A step-by-step back-of-the-envelope estimation guide for the Design Google Docs system design interview question, showing how capacity estimates shape architecture.
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Design a Rate Limiter: A System Design Interview Walkthrough
How to answer the rate limiter system design question — token bucket vs. sliding window, where to enforce the limit, and how to make it work across multiple servers.
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How to Design a URL Shortener (Bitly): The Complete Guide
Learn how to design a URL shortener step by step — short code generation, redirect-path caching, and data storage trade-offs — then rehearse the exact same question out loud in a live mock interview.
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