Marcus Fontoura is a Member of Technical Staff at Anthropic, where he works on infrastructure for AI. He works on efforts related to large-scale distributed systems, data centers, and engineering productivity. Fontoura has had several roles as an architect and research scientist in big tech companies, such as Yahoo! and Google, and was previously a Technical Fellow and CTO for Azure Core at Microsoft, as well as the CTO at Stone, a leading Brazilian fintech.

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