Stepan Koltsov@stepan_koltsovFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork ExperienceSenior Software Engineer/Team LeaderYandex | Яндекс• 2011Educationstepan_koltsov has not updated education details yet.LinksLinkedineCfDlAQOpWSHqPbtbqjiquA7ACFGtXBiaa14clx++OA= Skillsstepan_koltsov has not updated skills details yet.