After spending six years working for Goldman Sachs as an investment banker, Bjarke Mikkelsen faced a dilemma.

"I had a very comfortable life, but I wasn't really feeling like I had a purpose," he told CNBC Make It.

"In banking, you're always in the end, an advisor. I knew I wanted to try and run a business … I wanted to do something in tech but also something that had very operational aspects because I like building things."