Beaurain is a piano tuner by profession and also practices bodybuilding. He won several local bodybuilding contests and was president of a sports union for disabled people in France.[2] Beaurain was born visually impaired due to congenital glaucoma and completely lost his sight in 2008. He has focused on issues faced by people with disabilities during his political career.[3]
Beaurain joined the RN in the 2010s. In 2014, he was elected as a municipal councilor for the party in Chauny. During the 2022 French elections to the National Assembly, Beaurain contested the seat of Asine's 4th constituency and defeated En Marche incumbent deputy Marc Delatte during the second round.[4]