Its success was far from accidental.

Facebook’s founding is legend: In a Harvard dorm, wunderkind Mark Zuckerberg invented a new way to connect with friends…and the rest is history. But for the people who actually molded this great idea into a game-changing $300 billion company, the experience was far more tumultuous and uncertain than we might expect.

Mike Hoefflinger was one of those Facebook insiders. As a computer engineer turned marketing innovator who worked with COO Sheryl…