Zefanya graduated from Parahyangan Catholic University Law Faculty. During her time in college, she had won the Legal Essay Competition held by Parahyangan Catholic University. In addition, she is also a recipient of the German Academic Exchange Service (DAAD) Scholarship.
Zefanya had served as the Vice-President of the Parahyangan Law Debate Community, and had acted as a member of the AIESEC Local Committee Bandung. Furthermore, before joining Budidjaja International Lawyers, she had previously worked as an intern at an international market-entry firm in Jakarta.
Zefanya speaks Indonesian and English.