As an undergraduate student, Estéfano was a member of Escritório Bevilaqua, a junior enterprise associated with the Law School of Recife (UFPE), where he worked as Legal Marketing advisor, and participated in the Access to the Inter-American Human Rights System extension project (UFPE). He was also an undergraduate teaching assistant for the courses Corporate Law 1, Corporate Law 2, and Corporate Law 3, in addition to acting as an assistant director in the legal committees of the 5th and 6th editions of the Pernambuco Model United Nations.