System Design
Newsfeed App
An infinite social feed that scrolls at 60 fps, paginates without losing your place, and handles optimistic likes.
hardPremiumAsked at
By Rotem Meidan ·
"Design a newsfeed app like Twitter or Instagram."
Analyzing the Problem
Twitter and Instagram show a ranked list of text, images, and videos. We start with loading that list, then add scrolling, offline reading, and likes. Refresh and autoplay bring further constraints: new content should not interrupt the reader, and videos must share limited device resources. The server chooses the ranking; our design starts at the feed API.