Archive - System Design, but Simple

Design Twitter (X)

Like you should in an interview. Explained as simply as possible… but not simpler.

5 hrs ago

Design a Ticket Booking Service Like Ticketmaster

Like you should in an interview. Explained as simply as possible… but not simpler.

Aug 18 •

Stephane Moreau

Design a URL shortener

Interview walkthrough explained as simply as possible… but not simpler.

Aug 11

Gossip Protocol in 1 diagram and 179 words

Explained as simply as possible… but not simpler.

Aug 7

Idempotency in 1 diagram and 144 words

Explained as simply as possible… but not simpler.

Aug 4

July 2025

Fan‑out in 1 diagram and 178 words

Explained as simply as possible… but not simpler.

Jul 31

Fan‑in in 1 diagram and 186 words

Explained as simply as possible… but not simpler.

Jul 28

Reverse Proxy in 1 diagram and 188 words

Explained as simply as possible… but not simpler.

Jul 24

CDN in 1 diagram and 194 words

Explained as simply as possible… but not simpler.

Jul 21

Blue‑Green Deployment in 1 diagram and 195 words

Explained as simply as possible… but not simpler.

Jul 17

Auto scaling in 1 diagram and 171 words

Explained as simply as possible… but not simpler.

Jul 14

UDP (User Datagram Protocol) in 1 diagram and 162 words

Explained as simply as possible… but not simpler.

Jul 10

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