caiyun liu@liucaiyun423ruby on rails developerUnited StatesFollow BadgesProblem SolvingDays of JSSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experienceliucaiyun423 has not updated employment details yet.Educationliucaiyun423 has not updated education details yet.