A process for manufacturing a timepiece component, in particular a multi-level timepiece component, comprising a step of manufacturing at least one metal layer (13) of the timepiece component having an upper surface (15), wherein it comprises the following steps: E3: forming at least one cavity (14) in the upper surface (15) of the metal layer (13) of the timepiece component; E5: forming another metal layer (23) at least partially superposed on said upper surface (15) comprising a cavity (14), by a galvanic deposition of a metal or of an alloy, filling at least said cavity (14).