Xiaojie Qi@qi_xiaojieUnited StatesFollow BadgesProblem SolvingCPPJavaDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experienceqi_xiaojie has not updated employment details yet.Educationqi_xiaojie has not updated education details yet.