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Grzegorz Krzeszowski is a PHP Developer with experience working at various companies such as PayPo, Chabre IT Services, FarmaProm, FreshMail, and Sky-Shop.pl. At these companies, Grzegorz focused on creating software for email marketing, designing and implementing SMS engines, developing software for online stores using PHP5, PHP7, ExtJS, JavaScript, REST API, and MySQL, as well as creating loyalty programs and integrating platforms like Ebay. Grzegorz also worked as a Programista at Jagiellonian University and holds an educational background from Jagiellonian University and VII Liceum Ogólnokształcące.