Ryan Campbell and Jonathan Taylor competed against each other more than 30 years ago as members of opposing high school computer programming teams, but they've since worked together on and off to build multiple companies. That included Orlando-based Voxeo Corp., a software firm Campbell and Taylor founded in 1999 and sold for nearly $150 million in 2013. They're back together as the top executives of a company, as Taylor became CEO of Winter Park-based tech company Sighthound Inc. this summer,...