Jacek Kowalski@badjacFollow BadgesProblem SolvingDays of CodeDays ofStatistics CertificationsCertificate: Problem Solving (Basic)VerifiedskillWork Experiencebadjac has not updated employment details yet.Educationbadjac has not updated education details yet.Linksbadjac has not updated links details yet. Skillsbadjac has not updated skills details yet.