WILLIAM Tanuwijaya thought of ways to ride on the recently viral #10YearChallenge on social media, as this year marks the 10th anniversary of Tokopedia. On August 17, 2009, he was one of only four people operating the company, together with co-founder Leontinus Alpha Edison, one engineer, and one customer service employee. They launched the marketplace site from their homes—some of them renting a room in a house.

William, 38, wanted to com