25-year-old Alexandr Wang is the new Forbes youngest self-made billionaire. At 19 he dropped out of the Massachusetts Institute of Technology (MIT) to co-found the software company Scale AI. As a kid, he was a math whiz who competed in national math and coding competitions. According to reports, Wang grew up in the shadow of New Mexico’s Los Alamos National Lab, where his parents who were both physicists worked on weapons projects for the US military.

By 17 he was working full-time at Quora the question-and-answer site, where he met Lucy Guo Scale’s co-founder and together they started the company Scale AI in 2016. Wang told Forbes “I told my parents it was just going to be a thing I did for the summer,” He never went back to school.

Wang’s company Scale AI has been helping over 300 companies, from Toyota Research Institute, OpenAI, to Lyft. Wang says “Every industry is sitting on huge amounts of data, our goal is to help them unlock the potential of the data and supercharge their businesses with AI.”

Last year after a $325 million funding round last year valued Scale AI at $7.3 billion with an estimated $100 million in revenue, Wang’s estimated 15% stake is worth $1 billion, making him the world’s youngest self-made billionaire, according to Forbes.

Featured image source: Business Insider.