Design Tinder
Medium · System Design · about 45 minutes
Asked at Meta, Snap, Uber, DoorDash, Lyft, Grab.
Design a dating app like Tinder for ~20M daily users. Users set age, gender and distance preferences, get a stack of nearby profiles, and swipe right or left (~2B swipes/day). When two users like each other it's a match and both are notified. Users should never see a profile they've already swiped on.