Sonja Kostron is a FinTech and Product Management leader with over two decades of experience in commercial treasury management, payments, and digital banking. Currently driving business banking strategy at Narmi, she previously served as VP of Product Management at Fiserv, where she led a 170+ member cross-functional team, grew treasury solution revenue by 100% over three years, and delivered a holistic treasury services vision generating a consistent $60M in annual revenue. A Certified Treasury Professional Sonja is known for translating market insight into compelling product roadmaps, go-to-market strategies, and client-centered solutions that drive measurable growth.