“I spent a year at Microsoft, and then my co-founder had never worked at another company before. And he said, “Why don’t you come out to Boston and spend the summer here before you go off to graduate school?” And we started working during the summer—loved working every day. Woke up, spent almost twelve to fifteen hours every day working. That’s all we did—write code, talk to customers, build products. And then at the end of the summer we said, “This is fun. Let’s go full-time on this.””