Chien Rails98@chiennv_hackerViet NamFollow BadgesProblem SolvingSqlC languageRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: JavaScript (Basic)VerifiedskillCertificate: JavaScript (Intermediate)VerifiedskillWork Experiencechiennv_hacker has not updated employment details yet.EducationHanoi