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Learn to design large-scale systems, with interview prep built in

A long-running open study guide for designing large-scale systems and preparing for the system design interview.

It walks through the standard topics — load balancing, caching, databases, messaging, and the rest — with diagrams and trade-off discussions, and bundles Anki flashcards for spaced repetition.

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Runs in your browser

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Worth knowing A study guide, not a credential: interviews still test judgment, and some material shows its age. BuildTube has not run or verified this software.

Why it's here

Not trending this week

Last seen on the GitHub trending list on 28 September 2026. It stays on BuildTube so you can still find it.

  • 373,382 people have starred it on GitHub.

Numbers checked on 6 October 2026; not refreshed since.

Behind it

See the code on GitHub

BuildTube has not run or verified this project. Everything above is written from what the creator published.

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