John Sung@hyunsungSenior Software DeveloperFollow BadgesProblem SolvingJava CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experiencehyunsung has not updated employment details yet.Educationhyunsung has not updated education details yet.Linkshyunsung has not updated links details yet. Skillshyunsung has not updated skills details yet.