Sergii Kryvoblotskyi is a Head of Technological R&D at MacPaw Inc. since July 2015. Prior to that, Sergii worked as an iOS Software Developer at Alterplay from October 2012 to July 2015. Before that, Sergii was a Senior iPhone developer at Onix-Systems from February 2010 to October 2012. Sergii's responsibilities include estimation, architecture and design, programming, and code supporting, with experience in XP and TDD.