He built Calendly out of frustration, now the scheduling app is worth $3 billion—and the subject of a heated Twitter spat among Silicon Valley elite. Nine years ago, Awotona started Calendly, pouring his life savings of $200,000 into it and later quitting his job selling software for EMC. Today, the company has 10 million users … Continue reading Nigeria-Born Tope Awotona Now One of U.S. Wealthiest Immigrants