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ByteByteGo: System Design Video Series
Animated, diagram-first explainers on caching, API design, databases and real-world architectures.
By Alex Xu · ByteByteGo · Added 2026-08-01
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Overview before you open it
Covering topics and trends in large-scale system design, from the authors of the best-selling System Design Interview book series. This channel is managed by Alex Xu and Sahn Lam. To master system design, get our 158-page System Design PDF for free by subscribing to our weekly newsletter (10-min read):…
A talk or video. Watch it with a pause button handy: it is easiest to follow once you know the basic vocabulary.
- Who it suits
- New to system design: you can follow it without prior background.
- From
- ByteByteGo: see more from them
- Design areas it touches
- Caching and CDNDatabases and storageArchitecture and microservicesVideo, images and media
- Read it alongside
This overview is generated from the title, tags and where we use the resource; it is not a summary of the content. The original is by Alex Xu.
Study it, do not just read it
Before
Before you open it, spend two minutes sketching how you would build this yourself. Write down the biggest risk you can see.
While you read
- Which number or limit forced their main decision?
- What did they try first, and why did it stop working?
- What did they choose not to build?
After
- What would break first if traffic grew tenfold?
- What did they trade away to get what they wanted?
- Explain the design in three sentences, without looking.
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