We built Instagram in eight weeks. The lesson is that simplicity wins. Every feature you don't add is a gift to the user.

We had 13 employees and 30 million users when Facebook bought us. That ratio tells you everything about how software should work.

I left Instagram because the product I built stopped being mine. At some point, you have to choose between the company and your vision.

The most important decisions in product design are the things you choose NOT to build.

AI safety is the most important product problem of our generation. That's why I joined Anthropic.