Sergey Akopkokhyants is a software architect with more than 20 years of professional experience in designing and developing client and server-side applications. He is also a certified Java developer and project manager. He has general knowledge of many tools, languages, and platforms. For the last decade, Sergey has been responsible for customizing and producing weboriented applications for wholesale business management solutions projects for several worldwide mobile communication companies. His responsibilities have included: architecture design and guidance of client software development using Flex, CSS, HTML, JavaScript, TypeScript, and Dart, and client-server integration with Java. He is also the founder and an active contributor to several open source projects on GitHub. Sergey is passionate about web design and development and likes sharing his expertise with others, helping them to increase their skills and productivity. He is author of the book Mastering Dart and also he was one of reviewers of the books Learning Dart and Dart Cookbook.