University of Waterloo
James BradburyHead of Compute · AnthropicResearcher↗
Engineer · Executive · Researcher
Marcus Fontoura
AnthropicMember of Technical Staff
Fontoura shaped Azure across two Microsoft tenures, serving as chief architect for Azure Compute, leading its efficiency work, and later returning as Technical Fellow and CTO of Azure Core. After senior leadership roles, he joined Anthropic in June 2026 for hands-on AI infrastructure work. He also led engineering as Stone's CTO.
Career & education
Current roleAnthropicJun 2026-presentMember of Technical Staff
AnthropicJun 2026-presentPreviously
MicrosoftJan 2025-Jun 2026Technical Fellow and CTO, Azure CoreMicrosoft2013-2022Technical Fellow and Corporate Vice President; Chief Architect, Azure Compute
Google2011-2013Staff Research Scientist
Yahoo2005-2010Principal Research Scientist
IBM Research2000-2005Research Staff Member
Princeton University1999-2000Postdoctoral Researcher
MicrosoftJan 2025-Jun 2026StoneJun 2022-Jan 2025
CTO and Head of EngineeringMicrosoft2013-2022Google2011-2013Yahoo2005-2010IBM Research2000-2005Princeton University1999-2000Work and education history is primarily focused on AI-relevant roles and may not be comprehensive.
Based on public sources. If accuracy is important, verify details using the links or references.
For corrections, updates, or requests to remove information, contact us.
Reviewed August 18, 2026 · Checked for accuracy and new information.
