Grzegorz Holak@holi87Follow BadgesProblem SolvingPythonDays of CodeSqlRuby Certificationsholi87 has not earned any certificates yet. Work Experienceholi87 has not updated employment details yet.EducationUniversity of LodzLinksGithubhttps://github.com/holi87 Skillsholi87 has not updated skills details yet.