Senior Customer Success Manager (Commercial Growth) - Barcelona

At Fourthline, our mission is to fight financial crime. We help protect the global financial system by verifying millions of identities for banks, neobanks, online brokers, crypto exchanges, and insurers like N26, Trade Republic, flatexDEGIRO, Nationale Nederlanden, Qonto, Shine, Solarisbank, and more. Having started our journey in January 2018, we're incredibly proud to count around 250 employees between our Amsterdam and Barcelona offices with over 50 nationalities. About the role As a Senior Customer Success Manager at Fourthline, you'll own the relationships with our most strategic and enterprise customers. That means driving retention, accelerating product adoption, and spotting — and closing — upsell and cross-sell opportunities. You'll be the authentic voice of the customer inside Fourthline, translating their needs into better experiences and smarter decisions. Day to day, you'll work closely with our wider Commercial team, Solutions Engineering, Customer Operations, Delivery Managers, Product Managers, Legal, Compliance, and other key stakeholders — making sure collaboration across these teams is smooth and effective. Our Customer Success Managers put customers first, stay ahead of opportunities, and navigate complex cross-functional projects with confidence. And yes — they still make time for a (virtual) cold drink with the team on Friday afternoons. If that sounds like you, you'll fit right in. Responsibilities Drive successful adoption, retention, expansion, and a