Olena Kozlova@olena_kozlova_m1SwitzerlandFollow BadgesProblem SolvingJavaPythonDays ofStatistics CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experienceolena_kozlova_m1 has not updated employment details yet.Educationolena_kozlova_m1 has not updated education details yet.