Xinyu @X140YuChinaFollowAboutCurrentPied PiperMore about meiOS Engineer. https://github.com/X140Yu BadgesProblem SolvingDays of CodeRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Ruby (Basic)VerifiedskillCertificate: Ruby (Intermediate)VerifiedskillWork ExperienceX140Yu has not updated employment details yet.EducationX140Yu has not updated education details yet.