Jacek is a web developer specialized in building extensive web applications, mainly e-commerce solutions. The technologies he uses on a daily basis include PHP, MySQL, HTML+CSS and JS+jQuery. During the last few years he was the head developer of a highly customized online store platform in Poland. Now he's working on the development of several e-commerce websites running in Poland and Germany, often having hundreds of thousands pageviews a day. To take a break from coding, he does challenging crossfit workouts, goes out to taste some new food or dives into an interesting psychology magazine or book.

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