Make money doing the work you believe in
If you're preparing for system design interviews
(in 2026), learn these 16 case studies:
1. How Airbnb Works
2. How Google Docs Works
3. How Apple AirTags Work
4. How Spotify Works
5. How Instagram Scaled to 2.5 Billion Users
6. How Reddit Works
7. How Bluesky Works
8. How ChatGPT Works
9. How Kafka Works
10. How Slack Works
11. How Meta Handles 11.5M Serverless Function Calls per Second:
12. How Uber Finds Nearby Drivers
13. How Twitter Timeline Works
14. How YouTube Was Able to Support 2.49 Billion Users With MySQL
15. How AWS S3 Works
16 How WhatsApp Works
(What else should make this list?)
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Jan 17
at
1:44 PM