Born in Draguignan, France, Paulin began racing BMX bikes at the age of 6 and, won a BMX world championship at the age of 10. He won the 2007 European motocross championship in the EMX2 class. He then competed in the MX2 class of the Motocross World Championship with his best result being a third-place finish in the 2009 MX2 championship while riding for the Kawasaki Bud Racing PSM Racing team. Paulin was then contracted to ride in the premier MXGP class for the Honda factory racing team. He finished the 2015 FIM Motocross World Championship as runner up to Romain Febvre.
Paulin was a member of the French team victorious in 2014 Motocross des Nations, as well as in 2015 in 2016 and in 2017. He won a race in 2009, one in 2011 and both races in 2014.
|2017||Husqvarna||France/Rockstar Energy Husqvarna Factory Racing||FIM MOTOCROSS OF NATIONS||1|
|2016||HONDA||Team HRC||FIM MOTOCROSS WORLD CHAMPIONSHIP MXGP||13|
|2016||HONDA||France/Team HRC||FIM MOTOCROSS OF NATIONS||1|
|2015||HONDA||France/Team HRC||FIM MOTOCROSS OF NATIONS||1|
|2015||HONDA||Team HRC||FIM MOTOCROSS WORLD CHAMPIONSHIP MXGP||2|
|2014||KAWASAKI||MONSTER ENERGY KAWASAKI RACING TEAM||FIM MOTOCROSS WORLD CHAMPIONSHIP MXGP||8|
|2014||KAWASAKI||FRANCE/MONSTER ENERGY KAWASAKI RACING TEAM||FIM MOTOCROSS OF NATIONS||1|