Andrea Chiarelli has over 20 years experience as a software engineer and technical writer. In his professional career, he has used various technologies for the projects he has been involved in: from C# to JavaScript, from Angular to React, from ASP.NET to PhoneGap/Cordova. He has contributed to many online and offline magazines and has been the author of a few books published by Wrox Press and Packt. Currently, he is a senior software engineer at the Italian office of Apparound, Inc. and a regular contributor to HTML.it, an Italian online magazine focused on web technologies. You can follow him on Twitter at @andychiare. Lyubomyr Rudko is Senior Software Engineer, and has been developing large web application with JavaScript for the last 6 years. He has great experience in AngularJS, BackboneJS, React.js and Sencha ExtJS. Lyubomyr is a big fan of Javascript language and truly enjoys sharing his skills and experience with others. Currently, he is working as a Team Technical Lead for Lohika (http://www.lohika.com/elite-teams/). You can contact him at https://ua.linkedin.com/in/lyubomyrrudko