You just joined Spark, a dating app. You see one person at a time and swipe left or right, and if you both swipe right you can talk. Here is the thing to notice: nobody ever presses a “match” button. Ravi swipes right on Meera on Monday, and nothing happens. On Thursday, Meera swipes right on Ravi — and now they can talk. The match is simply those two swipes both existing. Design the first simple database behind it.

out of scopePhotos · prompts · distance · paid boosts · reporting and blocking