Alexander Efremov@a_s_efremovSystem AnalystRussian FederationFollow BadgesProblem SolvingPythonDays ofStatisticsC languageRuby CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Python (Basic)VerifiedskillWork Experiencea_s_efremov has not updated employment details yet.Educationa_s_efremov has not updated education details yet.