Nathalie Oestmann

Nathalie Oestmann is a Partner at Mangosteen Advisory, where she focuses on solving payment-related challenges that impede business growth, particularly at the intersection of fintech, Web3, and digital assets. Her expertise spans payments infrastructure, stablecoins, and scaling digital-asset ecosystems, with deep involvement in the iGaming sector.

Oestmann previously served as Chief Operating Officer at Outlier Ventures, a leading Web3 venture studio, and as Head of Samsung Pay for Europe, where she drove the regional expansion of the mobile payment platform. She also holds advisory roles and is a former Vice-Chair of The Payments Association, reflecting her influence in the payments industry.

Recognised as a LinkedIn Top Voice for thought leadership in payments, leadership, and Web3, Oestmann is a frequent speaker at major conferences such as SiGMA Europe, Money20/20, and the Brexit & Global Expansion Summit. Her insights on crypto, iGaming payments, and digital asset adoption are regularly sought by industry media.

Beyond her operational and advisory work, Oestmann contributes to the broader fintech ecosystem through judging roles, including serving as a judge for the Pay360 Awards. Her career reflects a consistent focus on bridging traditional payments with emerging digital asset technologies.