Oleg Zaitsev@archonoffRussiaFollow BadgesProblem SolvingJavaPythonSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Python (Basic)VerifiedskillWork Experiencearchonoff has not updated employment details yet.Educationarchonoff has not updated education details yet.