Nguyen Duong@NMDUONG99VietnamFollow BadgesProblem SolvingCPPJavaDays of CodeRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork ExperienceNMDUONG99 has not updated employment details yet.EducationNMDUONG99 has not updated education details yet.