Yubo

Before Yubo, Mikael used to work as consultant for many big banks and assurance companies. Yubo was like love at first sight, he was driven by the idea to work for a French social media with a strong ethical code, that aims to be the safest in the world, which is very ambitious and implies huge challenges. As Head of Infrastructure, he manages the devops, the data engineers, the security, the IT management. His top mission is to keep Yubo online, and make it scale.

Valentin used to work for another social discovery app, but after few months there he felt the job wasn’t technically challenging anymore. He aimed at discovering new architectures and improving his technical stack. Yubo really corresponded to his expectations, and he was specially attracted by the fact that at Yubo we are all tenacious advocates for our users’ safety, which is our priority. To him working for Yubo is technically challenging and empowering : we iterate fasten our designs are challenging, and we make sure our code is strong, qualitative and maintainable.

As Co-Founder and CTO at Yubo, Arthur is the architect of Yubo’s entire technology stack. He created, managed and scaled the technical infrastructure that supports Yubo and, today, he continues to develop and implement cutting-edge technology designed to enhance user experience and safety. Prior to founding Yubo, he developed a social networking platform with Jérémie and Sacha. Arthur is an alumnus of École Centrale Paris.

Sacha Lazimi is the co-founder and CEO of Yubo, the live social discovery app for Gen Z. Yubo is venture-backed by leading social media industry investors, with more than $60 million raised since the company was founded in 2015.

Prior to Yubo, as an 18-year-old mathematics student at Paris Dauphine University, Sacha developed with friends a hyper-geolocated group-chat app that allowed people to interact with a new person each day. This app and other similar projects were the foundation for Yubo, a social media platform enabling young people to socialize and create friendships in the digital world the same way they would in real life.

Under Sacha's leadership, Yubo has acquired more than 60 million users across more than 140 countries, with its greatest concentration of users in the U.S., the United Kingdom, and France.

Valentin is a Senior Product Manager at Yubo, which he joined in February 2025. He works at the intersection of product, data, and user experience. Before joining Yubo, he worked in media and tech environments where data drove growth and engagement. Today, Valentin focuses on turning insights into clear product decisions and building features that support engagement and monetization, while always keeping safety and long-term impact in mind.

Alyssa joined Yubo in October 2024, first as a Creative Strategist consultant and then as a Growth Manager. She has built her career in performance marketing, working closely with creative, product and data teams to turn insights into scalable growth and impactful campaigns.

At Yubo, she is motivated by the challenge of building long-term, sustainable growth. She works on defining user acquisition priorities, exploring new acquisition levers and continuously improving performance in a fast-paced environment. What excites her most is contributing to a product with a clear purpose, where scaling decisions are made thoughtfully and responsibly over time.

Sixtine is Trust & Safety Operations Manager at Yubo, which she joined in November 2024. She has spent her career in Trust & Safety and Care Operations across dating platforms, on-demand services and the design & printing industry, specialising in building and leading multi-level operations teams for fast-growing international scale-ups while preserving a strong, human-centred culture.

At Yubo, she turns Safety strategy into day-to-day operations: aligning policies with regional markets, sharpening moderation tools and ensuring critical cases are handled quickly and accurately. She chose this path because she wanted her work to truly matter, protecting users, especially the most vulnerable, and helping build an online space people can trust.