Mark Hartenstein@m_d_hartensteinGermanyFollow BadgesProblem SolvingCPP CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: C++ (Basic)VerifiedskillCertificate: C++ (Intermediate)VerifiedskillWork Experiencem_d_hartenstein has not updated employment details yet.Educationm_d_hartenstein has not updated education details yet.