0 shares Brian Shanahan (left), Brian Gross (middle), Jon Halpern (right) started Pineapple Payments after meeting through Halpern and Gross’ previous business, AthleteTrax. Photo courtesy of Pineapple Payments. If the last nine years have been a dream, don’t wake Brian Gross and Jon Halpern. The pair, along with partner Brian Shanahan, recently signed an agreement for Fiserv, Inc. to acquire their Pittsburgh-based payments technology company, Pineapple Payments. The deal is the latest leg of a journey that started for the lifelong friends when they were detailing cars together wh...