Twitter design
A simple design of Twitter
twittersystem design
Requirements
Functional
- Users can create account and login
- Users can create/read/update/delete tweets
- Users can follow other users
- Users can see timeline
- Users can search for tweets/hashtags
Non-Functional
- Timeline p99 ≤ 300 ms
- Support 100M+ users
- Read availability ≥ 99.9%
Author
Published
February 7, 2026
Last updated February 18, 2026