SJ DUAN@sjduan2019United StatesFollow BadgesProblem SolvingPython CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Python (Basic)VerifiedskillCertificate: Python (Intermediate)VerifiedskillWork Experiencesjduan2019 has not updated employment details yet.Educationsjduan2019 has not updated education details yet.