Stephen Zeng@stephen_zeng55United StatesFollow BadgesProblem SolvingDays of JS CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencestephen_zeng55 has not updated employment details yet.Educationstephen_zeng55 has not updated education details yet.