Sergey Petrov@duke_1984Software developer at Keysystems, ltdRussian FederationFollowAboutEducationChuvash State University BadgesProblem SolvingJavaDays of CodeSql CertificationsCertificate: SQL (Basic)VerifiedskillCertificate: C# (Basic)VerifiedskillWork Experienceduke_1984 has not updated employment details yet.EducationChuvash State UniversityComputer Information Systems, M.Tech•  2002 - 2007