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Jefferson Sofarelli has a diverse work experience spanning over 15 years. Jefferson most recently worked as a Senior Software Engineer at MINTangible since January 2022. Prior to that, they co-founded SourceCheck.org in 2018 and served as the Head of Technology. In this role, they focused on research and development of solutions related to user rights, privacy, and trust on the internet, along with expertise in self-sovereign identities, blockchain, smart contracts, decentralized applications, and decentralized file storage.

Before SourceCheck.org, Sofarelli worked as a Senior Software Engineer at HERE Technologies from November 2013 to January 2021. Jefferson also had a brief stint as a Freelancer in 2013. Prior to that, they worked at Global Leads Group as a Senior Software Engineer from August 2012 to January 2013. Sofarelli began their career as a Software Engineer and IT Consultant at Ascendant Technology from July 2009 to July 2012. Jefferson also worked as a Software Developer at the Social Trade Organisation (STRO) from October 2006 to July 2009.

Jefferson Sofarelli studied IT Management at Universidade do Sul de Santa Catarina, where they earned a Technologist degree. In addition to their formal education, they have obtained certifications from IBM, including one as an IBM Certified Application Developer in IBM Workplace Web Content Management v6 and another as an IBM Certified Solution Developer in IBM WebSphere Portal v6.1. However, the specific months and years when they obtained these certifications are not provided.