born in rennes, boumous graduated from the youth academy of laval and made his debut with the reserves in 2013 after having joined the youth team two years earlier. in may 2015, he signed his first professional contract with the club and was promoted to the senior team. on 22 may 2015, he made his first team debut in the last round of ligue 2, scoring a goal after having substituted in a 3–0 victory over charmois niortais.