Leon van der Knaap@LeonvdKNetherlandsFollow BadgesProblem SolvingJavaPythonDays of CodeDays of JSDays ofStatisticsSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: Problem Solving (Advanced)VerifiedskillCertificate: SQL (Basic)VerifiedskillWork ExperienceLeonvdK has not updated employment details yet.EducationLeonvdK has not updated education details yet.