Bosua grew up in Johannesburg, South Africa before moving to Dix Hills, New York as a child where he played soccer at Half Hollow Hills West High School and for Albertson Academy. While at Half Hollow Hills West, he was an All-League, Division, and County player, as well as Rookie of the Year in soccer. Bosua was ranked as a four-star recruit by Top Drawer Soccer. He committed to play college soccer at Columbia University on 19 June 2013.
Bosua attended Columbia University, where he played college soccer as a forward for the Columbia Lions from 2014 to 2017, tallying a total of 27 goals and 12 assists in 63 appearances. During his time at Columbia, Bosua was an Ivy League champion, a Second Team All-American, a two-time Ivy League Offensive Player of the Year, and a three-time First Team All-Ivy honoree.
After his senior season, Bosua was one of 60 college players invited to the 2018 MLS Combine. He was not selected by a team in the 2018 MLS SuperDraft. A year after going un-drafted, Bosua went on trial with the Charleston Battery of the USL. After a successful trial, he signed his first professional soccer contract with the Charleston Battery in March 2019.[2]
Bosua made his professional debut on 9 March 2019, coming on as a 75th minute substitute in a 1–1 tie against the Ottawa Fury. He made his first professional start and scored his first professional goal on 19 April 2019, in a 3–1 victory against Nashville SC.[3]