Marcus Fontoura is our Chief Technology Officer, a position he has held since June, 2022. Prior to joining StoneCo., Dr. Fontoura was a Technical Fellow and Corporate Vice President at Microsoft, where he worked as the chief architect for Azure compute and lead the Azure efficiency team. In his previous roles at Microsoft, he worked on the production infrastructure for Bing. Prior to Microsoft, he was a Staff Research Scientist at Google (2011-2013) where he worked in the Search Infrastructure team. Before joining Google, Dr. Fontoura was a Principal Research Scientist at Yahoo! Research (2005-2010) working on several projects in the area of computational advertising. Dr. Fontoura worked as a Research Staff Member at the IBM Almaden Research Center (2000-2005) where he was awarded with an IBM Outstanding Technical Achievement Award, with the notation for development of a new generation of IBM search technology and its deployment on w3.ibm.com. Dr. Fontoura finished his Ph.D. studies in 1999, at the Pontifical Catholic University of Rio de Janeiro, Brazil (PUCRio), in a joint program with the Computer Systems Group, University of Waterloo, Canada. After finishing his Ph.D. Dr. Fontoura was a post-doctoral researcher in the Computer Science Department at Princeton University for one year (1999-2000).