S1:E21 Sean Summers: The user's problem before a million issues

What makes Mercado Libre transform itself again after having already achieved almost everything? In this episode of Climbers & Scalers, Marcos looks back on key stages in Mercado Libre’s history and explains why he believes a new one is just beginning. He talks about the moment they rewrote their tech architecture, the impact of smartphones and apps, and why today he feels the same energy as in the early days. He also shares his vision on education, technology, and the role that both Mercado Libre — and he himself — can still play in the region. An episode about the future and all that has yet to be built. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

Holding your ground is sometimes a strategy. But other times, it’s a message. In this episode of scalers & climbers, Marcos recalls the toughest years against Amazon, the decisions made when the numbers didn’t add up, and why they chose to invest where others would have walked away. He also talks about the Chinese e-commerce giants, about how they compete in a market that blends shopping, entertainment, and social networks, and why in a world of artificial intelligence and invisible platforms, growth is not about imitation but about choosing which game to play. A conversation about culture, focus, and long-term vision. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

On May 21, 2025, Marcos surprised everyone by announcing that he was stepping down as CEO of Mercado Libre. He did it with a short letter, written in fifteen minutes with the help of artificial intelligence. In this episode, he tells for the first time how that process unfolded: what personal, family, and strategic factors led him to the decision, what role the Board played, and why stepping aside sometimes requires as much commitment as staying in charge. An intimate conversation about letting go, leaving a legacy, and knowing when to change roles. To keep scaling, from a different place. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

Linda Rottenberg is the founder and CEO of Endeavor, the leading global community of high-impact entrepreneurs. In the late 1990s, Linda flew down to South America and settled in Argentina. She began working in the social sector, until she concluded that what the region needed was not more microcredits, but more Microsofts being launched locally. She secured the first funding and the first entrepreneurs. Her story — and that of Endeavor — changed forever when she met Marcos and Hernán, the co-founders of Mercado Libre. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

They have a genuine calling to change the lives of millions of users. They look ahead. They love to compete and are far from being intimidated. They constantly re-prioritize. Because the context shifts so much, every year they redesign the org chart. They’d rather not hire than lower the bar. They sit side by side, argue fiercely, and from that clash come better ideas. Ari and Juan Martín share all of this in this episode. And it’s from this culture — one you can understand and embrace — that you realize the best is yet to come. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

For any logistics department, having demand double overnight is a nightmare. It’s impossible to scale warehouse and transportation capacity at that pace. Unthinkable — until a pandemic hits and it happens. Mercado Envíos not only managed to meet that demand, but grew 5X. In this episode, Ari and Juan Martín tell you how they pulled it off. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

Ari Szarfsztejn went from presenting recommendations to making things happen. Juan Martín went from helping with the family’s real estate business to diving straight into the garage with Marcos from day one. Today, both of them have led the odyssey of making sure that the things we buy with just a few clicks on Mercado Libre arrive at our doorstep in just a few hours — using a logistics network that includes everything from their own airplanes to smart warehouses. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

Everyone gets a complaint, a rant, or a request for help every week. Everyone — from the first to the last. In many places, people assume the user experience team will take care of it. At Mercado Libre, Sean says, you take care of it yourself. You might have a million things going on in your day-to-day, but the first thing Sean wants to understand is why the user had that problem. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

Sean Summers trained at PepsiCo through three different cycles. But when he arrived at Mercado Libre, he sensed a founder’s mentality infused throughout the organization — something he hadn’t found anywhere else with professional managers. From his position as the top leader of marketing and the advertising business, Sean shares some of the elements of that founder’s mentality that make them unique. Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/

To compete with Amazon, they needed to bring in talent with deep knowledge of how it operated. One of them was Germán Spataro, who had worked at Amazon UK, Amazon Spain, and Amazon Brazil. From his encounter with Jeff Bezos to the differences in culture, Germán shares why Mercado Libre beats Amazon. But Stelleo is clear about one thing: today, everyone takes for granted that Mercado Libre is one of the world’s most important companies. But that’s how Yahoo looked just a few years ago — and today it has been displaced by Mercado Libre from the list of the 100 most important companies on the Nasdaq index. How do you make sure not to meet the same fate? Producer & Host: Federico Eisner | https://www.linkedin.com/in/feisner/