Marian Kostyk@marian13UkraineFollow BadgesProblem SolvingRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Ruby (Basic)VerifiedskillCertificate: Ruby (Intermediate)VerifiedskillWork Experiencemarian13 has not updated employment details yet.Educationmarian13 has not updated education details yet.