Christos Alvertis@alvertischrisGreeceFollow BadgesProblem SolvingJavaDays of CodeDays of JSSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillWork Experiencealvertischris has not updated employment details yet.Educationalvertischris has not updated education details yet.