yi liu@alexliuyi1987United StatesFollow BadgesProblem SolvingJavaPythonDays of CodeDays ofStatisticsSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Python (Basic)VerifiedskillCertificate: SQL (Basic)VerifiedskillWork Experiencealexliuyi1987 has not updated employment details yet.Educationalexliuyi1987 has not updated education details yet.