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William R. J. Ribeiro has worked in a variety of roles since 2005. In 2005, they were a Trainee at TCU - ADCON, where they were responsible for validating Software Specification and Use Cases Definition documents, creating Web applications prototypes and mockups of functional software, and acting as the webmaster and web designer of the department's intranet portal. In 2006, they worked as a Software Engineer at Optimedia Tecnologia em Informática Ltda, where they developed Rich Internet Applications using ActionScript 3 and Adobe Flex. William R. J. also worked as a volunteer Game Designer/Developer at Nine Green Game Development Group. From 2009 to 2011, they worked at Tricode Professional Services as a Software Engineer, developing with Java, JSF 2.2, Primefaces, JavaScript and CSS, as well as performing software quality assurance and profiling. From 2011 to 2016, they worked at WoodWing as a Software Engineer, developing an Adobe Air application for the BlackBerry Playbook, HTML + Javascript components and web stores for iPad, Android and BlackBerry. From 2016 to 2017, they worked at Xpand IT as a Senior Web Application Developer. From 2017 to 2019, they worked at Talkdesk as a Frontend Software Engineer, part of an Agile multi-disciplinary team responsible for a proprietary UI framework and Design System. Since 2021, they have been a Senior Fullstack Software Engineer at Hala Systems, Inc.

William R. J. Ribeiro's education history includes a Bachelor in Computer Science from the Universidade de Brasília (2003-2008) and a Massive Open Online Course by Coursera in Learning How to Learn: Powerful mental tools to help you master tough subjects (2015). William R. J. also holds certifications from Code School in Blasting Off With Bootstrap (April 2016), ES2015: The Shape of JavaScript to Come (April 2016), Fundamentals of Design (April 2016), Building Blocks of Express.js (March 2016), Real Time Web with Node.js (March 2016), Shaping up with Angular.js (March 2016), The Magical Marvels of MongoDB (March 2016), and Anatomy of Backbone.js (no date provided). Additionally, they hold an Oracle Certified Professional, Java SE 6 Programmer certification from the Oracle Certified Professional Program (October 2010) and certifications from Code School in App Evolution With Swift (no date provided) and Staying Sharp with Angular.js (no date provided).