Konstantin Mazur@mazurkostya93Sigma SoftwareUkraineFollow BadgesProblem SolvingDays of CodeSql CertificationsCertificate: Problem Solving (Basic)VerifiedskillCertificate: Problem Solving (Intermediate)VerifiedskillCertificate: SQL (Basic)VerifiedskillCertificate: SQL (Intermediate)VerifiedskillWork Experiencemazurkostya93 has not updated employment details yet.Educationmazurkostya93 has not updated education details yet.