John Collison has been confirmed to be the youngest self-made billionaire in the world. Collison who is the co-founder and President of Stripe had founded the tech company along with his older brother Patrick Collison, Stripe’s CEO. in 2010.

Now Collison, 27 is the youngest self-made billionaire in the world, with a net worth totaling $1.1 billion after Stripe’s $9 billion valuation in 2016. The company was designed to transform the way websites accept online payments, and it’s a favorite of huge companies like Lyft and Facebook.

Though the siblings have struck Silicon Valley gold, they haven’t forgotten their humble roots in small-town Ireland.

John Collison who is originally from Ireland went to the US to attend Harvard – until he dropped out to focus on Stripe in Silicon Valley.