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How Mercado Libre built Latin America's most valuable company: 18k engineers, 30k deploys a day, and their own fleet of planes | Sebastian Barrios

Sebastian Barrios was the longtime head of product and engineering at Mercado Libre, the largest company in Latin America—valued at over $100 billion and home to more than 100,000 employees. There, he led a team of more than 18,000 engineers across 18 countries and oversaw an astonishing 30,000 code deployments a day. Before Mercado Libre, he founded multiple startups, including a ridesharing company that competed directly with Uber in Latin America. And at just 17, he got a personal phone call from Steve Jobs asking him to take his app off the App Store. Today, Sebastian is the SVP of Engineering at Roblox.

What you’ll learn:

• Why Mercado Libre operates with 95% fewer PMs than typical tech companies (and how it actually works)

• How to maintain product quality with 30,000 daily deployments and distributed ownership

• The weekly email system Sebastian uses to maintain alignment with leadership

• How to build a culture of radical candor and direct feedback in a traditionally hierarchical region

• The counterintuitive approach to product reviews that keeps 18,000 engineers aligned

• How to evaluate hype cycles (crypto, AI) pragmatically while staying innovative

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