System Design Factory

Track 1 · Core

News Feed

A Twitter-style feed: post once, reach every follower, and keep the feed fast for people who only scroll.

Pro Medium 13 min guided 10 Checks

What you practice

People scroll far more than they post, and a few accounts have millions of followers. You will get each post into every follower's feed and keep scrolling fast, without losing a post or showing it twice.

This Exercise is part of Pro. The free Exercise and the Sandbox are open to everyone.