Born in Champs-sur-Marne, Boutsingkham started his youth career playing for AS Champs, before he transferred to FC Nantes in 2018.[1] He began his senior career with the reserves of Nantes in 2022, before being promoted to their senior side in January 2024.[2] He made his first team debut on 5 January 2024 in a 4–1 Coupe de France win against Pau.[3] Three weeks later, he made his professional debut with Nantes as a late substitute in a goalless Ligue 1 tie with Reims.[4]
Born in France from a Lao-Thai father and a French mother, Boutsingkham is eligible to represent Laos, Thailand or France in the international level.[6] He represented France at youth level, having played for France U16 and France U17.[3]