Olga Vyrostko@vyrostkoolgaiOS Developer at YandexRussian FederationFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencevyrostkoolga has not updated employment details yet.Educationvyrostkoolga has not updated education details yet.