The app for independent voices
If you want to become good at SYSTEM DESIGN
(in 2026), learn these 18 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 at 1 Million Requests per Second:
16. How Stripe Prevents Double Payment Using Idempotent API
17. How YouTube Was Able to Support 2.49 Billion Users With MySQL:
18. How to Scale an App to 10 Million Users on AWS
(What else should make this list?)
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