The app for independent voices
If you're serious about system design (in 2026),
learn these 21 case studies:
1. How Stock Exchange Works
2. How WhatsApp Works
3. How Spotify Works
4. How Reddit Works
5. How Bluesky Works
6. How ChatGPT Works
7. How Google Docs Works
8. How Kafka Works
9. How Tinder Works
10. How Slack Works
11. How Twitter Timeline Works
12. How Amazon S3 Works
13. How URL Shortener Works
14. How Meta Handles 11.5M Serverless Function Calls per Second:
15. How Uber Finds Nearby Drivers
16. How Nginx Works
17. How YouTube Was Able to Support 2.49 Billion Users With MySQL
18. How Model Context Protocol Works
19. How Uber Computes ETA
20. How Google Search Works
21. How Do AirTags Work
(What else should make this list?)
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