Kostiantyn Korolkov@kkk2008KkknoneUkraineFollow BadgesProblem SolvingJavaDays of CodeDays ofStatisticsSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Java (Basic)VerifiedskillWork Experiencekkk2008Kkk has not updated employment details yet.Educationkkk2008Kkk has not updated education details yet.