Sergey Makhno@sergeymakhnoNoneRussian FederationFollow BadgesProblem SolvingJavaDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Java (Basic)VerifiedskillWork Experiencesergeymakhno has not updated employment details yet.Educationsergeymakhno has not updated education details yet.