Kevin & Mike are the co-founders of Instagram. What began with a chance meeting at a cafe turned into a billion dollar business and a partnership that’s lasted a decade. A key to their relationship was understanding each other’s strengths and how those translated into individual roles at a company: CEO and CTO, respectively. But the title that came first and foremost, for both of them, was co-founder.

You can find Kevin and Mike on Instagram at @kevin and @mikeyk.