System DesignInterview Notes

Comprehensive notes based on System Design Interview – An Insider's Guide (Vol 1 & 2) by Alex Xu

Volume 1 · Foundations

Chapters 1–15 covering scaling, rate limiting, consistent hashing, key-value stores, URL shorteners, crawlers, and more.

Start Vol 1

Chapters 16–28 covering proximity services, Google Maps, message queues, payment systems, stock exchanges, and more.

Start Vol 2

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Every chapter is fully searchable. Use Ctrl+K (or ⌘K on Mac) to instantly find any concept across all 28 chapters.

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Each chapter breaks down a real-world system design problem with diagrams, trade-offs, and key takeaways.

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Read comfortably on any device — phone, tablet, or desktop. The sidebar and content adapt automatically.

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Every chapter has a clean URL you can bookmark or share. Each section is also directly linkable via anchor.