Matt Mickiewicz: Today's Notable Young Entrepreneur By Notable Life By Notable LifeView Author|November 25, 2015|Young EntrepreneursView Young Entrepreneurs Matt Mickiewicz is a serial entrepreneur who launched his first business at just 14 years old and has since built some of the most forward-thinking companies of our time, including SitePoint, Flippa, 99designs, and Hired. We caught up with him... View this article.