9X generation math talent works at Google after turning down initial offersVietNamNet Bridge - Besides its 2018 list of 30 Under 30, Forbes has also named the 10 most promising faces are believed to go far in their fields. Later, as an 11th grader, he won third prize at the national mathematics competition, silver medal at the 2009 International Math Olympiad (IMO) and other prizes. When he was a second-year university student, Hieu passed the interview round organized by Google to seek interns, but he was rejected because of lack of experience. At third year at university, Google invited Hieu to return for internship there, but he refused the opportunity. In 2016, Hieu accepted his third invitation from Google, joining the team to develop apps for Google Brain.