Stéphane Alizon: Leading Younited's Tech Transformation

Alejandro Martínez · 2026-03-27

Let's talk about the people who actually build the future of European payments. You know, the ones behind the scenes making the systems work. Stéphane Alizon is one of those key players. As the Chief Technology Officer at Younited, he's been steering the ship's tech strategy since 2014. That's a decade of shaping how a major fintech operates. He's got over 20 years of experience across fintech, digital platforms, and those massive enterprise systems that keep everything running. His central role? Scaling Younited from a fast-growing startup into a genuine European leader. We're talking about a company that now operates across five countries and processes over $1.1 billion in annual Gross Merchandise Value. That's a serious journey. ### Building a Tech Powerhouse from the Ground Up When Stéphane stepped in, the engineering team was just 10 people. Think about that for a second. Today, he's grown that organization to 200 strong. That's not just about hiring; it's about building a culture. He focused on excellence, agility, and real innovation. It's the kind of environment where big ideas can actually get built. One of his biggest moves was leading the full migration away from a clunky, old-school monolith system. You know the type—slow, hard to update, a nightmare to scale. He moved everything to a cloud-native, microservices-based architecture. We're talking more than 200 individual services now. This wasn't just a tech upgrade. It was a landmark moment. Younited became the first institution regulated by the Banque de France to operate fully in the cloud. That's a huge deal for trust and security in the payments space.  ### Engineering for Speed and Security But moving to the cloud is one thing. Making it work brilliantly is another. Stéphane and his team established a highly automated CI/CD pipeline. In plain English? That means they can deploy updates more than 15 times a day. The system is constantly improving, which is crucial in the fast-moving world of EU payments. And let's not forget security. With great power (and great data) comes great responsibility. He reinforced their cyber defenses to state-of-the-art standards. When you're handling payments and sensitive financial data, you can't cut corners. It's about building a fortress, not just putting up a fence. ### Driving New Business and Strategic Growth His technical leadership directly enabled the launch of new business lines. This includes Credit as a Service, Payments solutions, and Personal Financial Management (PFM) tools. These aren't just side projects; they're core expansions of what Younited offers. He's also been pivotal in forging major strategic partnerships with global players. Think about the network effect there. Furthermore, his contributions have been direct in areas like fundraising, international expansion, and even Younited's listing on Euronext Tech Leaders. The CTO's role is clearly strategic, not just technical. - **Legacy Migration:** Led the shift from monolith to 200+ microservices. - **Team Growth:** Scaled the engineering team from 10 to 200 people. - **Deployment Speed:** Enabled over 15 production deployments daily. - **Market First:** Achieved full cloud operation as a Banque de France-regulated entity. Before all this at Younited, he cut his teeth at major names like PMU, Renault, and Atos. There, he delivered large digital programs and complex international platforms. That experience in large-scale, reliable systems is exactly what you need to build a resilient payment infrastructure. So, what's the takeaway for professionals watching the European payments and Wero ecosystem? It's that sustainable growth is built on a foundation of strong, scalable, and secure technology. Leaders like Stéphane Alizon show that the CTO's chair is central to navigating regulation, fostering innovation, and ultimately, processing those billions securely. The future of EU payment systems isn't just about the next feature—it's about the robust architecture that makes it all possible.