He was elected to the French National Assembly on 18 June 2017, representing the department of Ille-et-Vilaine.Born in Thionville, Bachelier studied law at the University of Rennes while working as a pizza deliveryman, waiter, and receptionist for Gaumont as side jobs.
He joined the Socialist Party in the early 2000s before joining En Marche! during its founding in 2016.Bachelier currently holds a position in the Bureau of the Nation Assembly of the 15th legislature of the French Fifth Republic as a quaestor.