Sergey Dobrynin@sergeydobrynUnited StatesFollow BadgesProblem SolvingDays of Code CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experiencesergeydobryn has not updated employment details yet.Educationsergeydobryn has not updated education details yet.