João Graça is a cofounder and CTO of Unbabel. He received his PhD in natural language processing and was a post-doctoral researcher at the University of Pennsylvania, where he developed a new statistical learning method that allowed for the insertion of declarative knowledge during learning, unlocking previously impossible-to-tackle problems for solving. João was also awarded a Marie Curie, Welcome II program (2011) scholarship, which he ended up declining to pursue entrepreneurship. He is also one of the cofounders of the Lisbon Machine Learning Summer School (LxMLS).