Loiane Groner has over 9 years of software development experience. In her university, she demonstrated a great deal of interest in IT. She worked as a teacher's assistant for 2.5 years for algorithms, data structures, and computing theory. She represented her university at the ACM International Collegiate Programming Contest – Brazilian Finals (South America Regionals), and she also worked as the student delegate of the SBC (Brazilian Computing Society) for 2 years. Loiane won a merit award in her senior year for being one of the top three students in her course. She had one of the highest GPAs in the computer science department, and also graduated with honors.

She has already worked at multinational companies, such as IBM. Her areas of expertise include Java SE and Java EE and also Sencha technologies (such as Ext JS and Sencha Touch). Nowadays, Loiane is working as a software development manager at a financial institution where she manages overseas solutions. She also works as an independent Sencha consultant and coach.

Loiane is also the author of Ext JS 4 First Look, Mastering Ext JS (first and second editions), Sencha Architect App Development, and Learning JavaScript Data Structure and Algorithms, all published by Packt Publishing.

She is passionate about Sencha and Java, and she is the CampinasJUG (Campinas Java Users Group) leader and an ESJUG (Espirito Santo Java Users Group) coordinator, both of which are Brazilian JUGs.

Loiane also contributes to the software development community through her blogs, which can be found at http://loianegroner.com (the English version) and http://loiane.com (the Portuguese-BR version), where she writes about IT careers, Ext JS, Sencha Touch, PhoneGap, Spring Framework, Java, and general development notes and also publishes screencasts.

If you want to keep in touch with her, you can find her on Facebook (https://www.facebook.com/loianegroner) and on Twitter (@loiane).

Gabriel Manricks is a full-stack software and web developer, and a writer. He is the CTO at CoinSimple and a staff writer at Nettuts+, where he enjoys learning as well as teaching others. He also freelances in the fields of web consulting, development, and writing.