Mark Zuckerberg | $90 Billion | Former Software Developer

Before Facebook CEO founder Mark Zuckerberg became the youngest self-made billionaire at age 23, he has been the go-to software developer at Harvard University. He built a reputation of being an expert in coding and developing inside the university. He was the man behind the infamous Facemash program, where Harvard students voted between two students, rating them on attractiveness. It was eventually shut down due to its inappropriate content.

Today, Zuckerberg holds a $90 billion net worth, and all credit goes to his social network brainchild which he refused to sell despite numerous offers. His massive wealth has made him the 4th richest person in the world. Of course, books and movies were made to tell the story of his rise, the plot details of which he’s on record as disputing. Nevertheless, Zuckerberg remains an icon of technology and will remain so for generations to come.