I briefly spoke to Karp at SXSW this year. I had no idea who he was. Me: "So what do you do?" Karp: "I work at Tumblr." Me: "What do you do there?" Karp: ".

I briefly spoke to Karp at SXSW this year. I had no idea who he was. Me: "So what do you do?" Karp: "I work at Tumblr." Me: "What do you do there?" Karp: "...I'm an engineer" Me: "What kind of engineer?" Karp: "...A little of everything." One of my friends had to tell me he was the goddamn CEO. I've never met a CEO who was that modest.