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Sergio Postarek has a long and varied work experience. Sergio started their career in 1995 as a Systems Analyst at Colortel. Sergio then moved to NV Consultoria in 1996, where they also worked as a Systems Analyst. In 1999, they joined InvestShop.com as a Senior Systems Analyst. In 2001, they became a Partner at qx3, where they also served as Co-Founder and Head of Product. In this role, they conceived and developed Spinnex, a high performance and customizable CMS used by companies like XP, Ágora, Prosper, Votorantim, Concordia, Sofisa, Bradesco and many others. Sergio also transitioned the company to agile methodologies and created Scrumbook, an agile product management and team collaboration software. In 2012, they co-founded Nibo and served as Head of Innovation and CTO. Sergio also co-founded Postback, a company dedicated to creating online solutions that make people's lives simpler and more productive.

Sergio Postarek obtained a Bachelor in Computer Science from Pontifícia Universidade Católica do Rio de Janeiro between 1994 and 1997. Sergio then went on to receive an ASIT in Internet from Universidade Federal do Rio de Janeiro in 1999.