Jan William Sianturi@william_sianturiSoftware Engineer At RuangguruIndonesiaFollowAboutEducationUniversitas Sanata Dharma BadgesProblem SolvingJavaRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork ExperienceSoftware EngineerRuangguru•  October 2021 - PresentEducationUniversitas Sanata DharmaInformation Technology, B.Tech•  July 2015 - June 2019