Before joining Sequoia Arc, Alfred Lin was CFO, COO, and chairman at Zappos, where he helped grow the company from about $300 million to $1.6 billion in sales, and he later showed that same hands-on style with Airbnb, spending a day a week inside the company during its highest-growth stretch and staying closely involved when its revenue dropped 80% during COVID, pushing for debt instead of a down round because he believed in the rebound. Founders also point to his habit of asking extremely specific questions and recalculating market size himself rather than relying on general pattern matching, and despite this track record he stays notably out of the spotlight, a trait that traces back to a scrappy start as a kid running a lawn-mowing business and reselling pizza slices in college before leaving a Stanford PhD program to join Tony Hsieh at Zappos.