Sunghyuk Gong@gonghackerrankBackend EngineerKorea, Republic ofFollow BadgesProblem SolvingCPPPythonSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: SQL (Basic)VerifiedskillWork Experiencegonghackerrank has not updated employment details yet.Educationgonghackerrank has not updated education details yet.