KONSTANTINOS APOSTOLOPOULOS@k_apostolopoulosSwitzerlandFollow BadgesProblem Solving CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencek_apostolopoulos has not updated employment details yet.Educationk_apostolopoulos has not updated education details yet.