Sergey Olontsev@olontsevData EngineerRussian FederationFollowAboutCurrentKaspersky LabEducationPomor State University BadgesProblem SolvingCPPJavaPythonSql CertificationsCertificate: SQL (Basic)VerifiedskillWork Experienceolontsev has not updated employment details yet.Educationolontsev has not updated education details yet.