Ha Jin Song@hSong6230Follow BadgesProblem SolvingRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork ExperiencehSong6230 has not updated employment details yet.EducationhSong6230 has not updated education details yet.LinksGithubhttps://github.com/hajin-song SkillshSong6230 has not updated skills details yet.