junjie zhang@junjiezFollow BadgesProblem SolvingJava CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencejunjiez has not updated employment details yet.Educationjunjiez has not updated education details yet.Linksjunjiez has not updated links details yet. Skillsjunjiez has not updated skills details yet.