Marcus Fontoura is currently in his second tenure as Technical Fellow and Corporate Vice President at Microsoft, where he works as CTO for Azure Core.

Most recently, he was the CTO at Stone (2022-2025), where he led the engineering organization, focused on building highly efficient financial platforms and an amazing engineering culture. He continues to serve as an advisor to the company.

Previously, in his first tenure as Technical Fellow and Corporate Vice President at Microsoft (2013-2022), Marcus worked as the chief architect for Azure Compute and led the Azure efficiency team. Marcus also had posts at Google, Yahoo, and IBM Research.