How @jmj took down Tinder with its first push notification: "My first week, Tinder had no ability to send a push notification. We could send transaction notifications, so you have a message or you have a like. But we as a company could not send a push notification. The company just had not invested the resources in building it. So within a week they're like, 'Can you help us figure out how to send push notifications?' Then I was like, you know what? If I send our first push notification to 40 million people, I guarantee you we're gonna have a big day. At the time they gave me a CSV file of the mobile IDs. Literally exported a single file that lived on my hard drive. It was something you would never do as a public company. This was announcing a feature called Super Like. We had to figure out how to get it translated into 40 different languages. One of the things I figured out quickly was that you should rate limit the notifications, because if we just sent 40 million people the same notification at once, Tinder would go down. I ended up doing that by accident once or twice. We took down Tinder. But we sent it out and had our highest daily active day ever. That was within my first two or three weeks. Everyone's like, 'Jeff is a smart guy. He knows how to send push notifications.' It was amazing. I was like, literally I can be a hero at this company. From that they put me in charge of revenue, and we ended up becoming the top grossing app in the world."