Feng Yuansong@yf571Software Engineer at Duke UniversityUnited StatesFollowAboutCurrentDuke University BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillWork Experienceyf571 has not updated employment details yet.Educationyf571 has not updated education details yet.