Billy Lau@billycmlauSenior System AnalystHong KongFollow BadgesProblem SolvingJavaPythonSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Java (Basic)VerifiedskillWork Experiencebillycmlau has not updated employment details yet.Educationbillycmlau has not updated education details yet.