Engineers love to optimize problems. Now I optimize logistical problems. I ask: 'What's the goal? What are our constraints? What is the optimal, elegant way to get to that goal within those constraints?' I break it down in terms of a data funnel: 'Where in the funnel are we inefficient?' That analytical background really helps.

I was one of the key people responsible for building Facebook's News Feed. When we launched it in 2006, users hated it. There were 'I Hate Facebook' groups; random people organized protests. We even hired a security team.

Cove is essentially a collaboration, coordination and communication tool for the administration of organizations and communities, from the Stanford Graduate School of Business Entrepreneurship Club to church groups and schools.

When I started out in Facebook, it had only 20 people. I saw it grow to a thousand employees and from five million users to over a billion users. I saw it evolve from a service that served college students to one that served the world.