All Topics
Every system design topic. One place.
01VERY COMMON
URL Shortener
8 Concepts10 Cheat Items
GoogleMetaAmazonMicrosoftUberStripe
02VERY COMMON
Rate Limiter
8 Concepts10 Cheat Items
GoogleMetaAmazonStripeCloudflareUber
03VERY COMMON
Twitter / News Feed
8 Concepts10 Cheat Items
GoogleMetaAmazonTwitterLinkedInNetflix
04VERY COMMON
Web Crawler
8 Concepts10 Cheat Items
GoogleAmazonMicrosoftAppleMetaLinkedIn
05VERY COMMON
YouTube / Video Streaming
8 Concepts10 Cheat Items
GoogleNetflixAmazonMetaMicrosoftApple
06COMMON
Google Drive / Dropbox
8 Concepts10 Cheat Items
GoogleDropboxMicrosoftAmazonMetaApple
07VERY COMMON
Uber / Ride Sharing
8 Concepts10 Cheat Items
UberLyftGoogleAmazonMetaMicrosoft
08VERY COMMON
Instagram / Photo Sharing
8 Concepts10 Cheat Items
MetaGoogleAmazonMicrosoftNetflixUber
09VERY COMMON
Chat System / Messenger
8 Concepts10 Cheat Items
MetaGoogleMicrosoftAmazonSlackDiscord
10VERY COMMON
Consistent Hashing / Distributed Cache
8 Concepts10 Cheat Items
AmazonGoogleMetaDiscordAkamaiUber
11COMMON
Credit Card Processing System
8 Concepts10 Cheat Items
StripeSquarePayPalAmazonGoogleAdyen
12COMMON
Distributed Database Control Plane
8 Concepts10 Cheat Items
GoogleAmazonCockroachDBMetaPlanetScaleMicrosoft
13COMMON
Music Streaming Platform
8 Concepts10 Cheat Items
SpotifyAppleAmazonYouTube MusicSoundCloudTidal
14COMMON
Google Maps / Navigation
8 Concepts10 Cheat Items
GoogleAppleUberMapboxHereWaze
15VERY COMMON
Notification System
8 Concepts10 Cheat Items
GoogleAppleAmazonMetaUberAirbnb
16COMMON
Key-Value Store
8 Concepts10 Cheat Items
AmazonGoogleMetaLinkedInNetflixDatastax
17COMMON
Unique ID Generator
8 Concepts10 Cheat Items
TwitterDiscordMetaInstagramSonyBaidu
18COMMON
Search Autocomplete
8 Concepts10 Cheat Items
GoogleAmazonLinkedInMetaUberAirbnb
19COMMON
Distributed Task Scheduler
8 Concepts10 Cheat Items
GoogleAmazonUberAirbnbNetflixSlack
20COMMON
Ad Click Aggregator
8 Concepts10 Cheat Items
GoogleMetaAmazonTikTokPinterestUber
20 topics · 160 concepts · 200 cheat sheet items · 100% free