Romero joined the youth system of Estudiantes in 2005, following a short spell with Inter de Villa Elvira.[2][3][5] After fifteen years in their academy, the central midfielder was moved into the club's first-team in 2020–21 under caretaker manager Leandro Desábato.[6] Romero was on the bench in early November for Copa de la Liga Profesional defeats to San Lorenzo and Argentinos Juniors, which preceded his senior debut arriving later that month in the same competition against Aldosivi; he was substituted on in place of Iván Gómez midway through the second half of a home defeat.[4]
