Tobias Lütke
Tobi is CEO and founder of Shopify. Before taking the helm of the company, Tobi was active in many open source projects. The best known is the Ruby on Rails framework where Tobi served as a core team member starting in 2004. Tobi also released a series of open source projects that are used around the world such as Liquid, DelayedJob, and ActiveMerchant.
Lately he has started donning suits and hanging out with VCs instead of Vim. He isn't sure what he thinks about this either.