With over 30 years of extensive experience in software development, Sergiy Zhelnov has programmed drivers and applications for both Windows and Unix systems. His profound knowledge is exemplified by his numerous contributions to building the Unix kernel. He graduated from the cybernetics department at the University of Taras Shevchenko in Kiev. Currently holding a managerial position at EY, Sergiy leads a dynamic team that spearheads the development of a tax application catering to customers in Poland and the European Union.

Eight years ago, Sergiy moved to Poland, adding a global perspective to his professional journey.
Outside of the tech world, he has diverse interests including chess, strategy games, and a keen appreciation for history.