Join COLIBRIX ONE – Innovating the Future of PaymentsAt COLIBRIX ONE*, we’re building advanced, AI-powered payment technologies that support Payment Service Providers (PSPs), Electronic Money Institutions (EMIs), and neobanks across the EU and the UK. As a fully licensed Electronic Money Institution (FCA Reference No. 927920) and holder of a Financial Institution Licence issued by the MFSA, as well as a principal member of both VISA and Mastercard, we provide comprehensive, real-world financial solutions that include:General card processingDigital wallet infrastructureCross-border merchant accountsAlternative payment methods (APMs)Corporate accounts for legal entitiesWe’re a fast-growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact - and we’re looking for talented professionals who are ready to shape the future of fintech.At COLIBRIX ONE, your work directly powers the digital economy. If you're eager to solve meaningful challenges and build with purpose,



we’d love to hear from you.The RoleAs aChargeback Specialist, you will manage the end-to-end card dispute process within an acquiring environment under Visa and Mastercard schemes. You will analyze transactions, prepare representments, and collaborate with banks and merchants to resolve disputes and improve win rates. The role also involves monitoring chargeback trends across a diverse merchant portfolio, supporting risk mitigation efforts, and ensuring compliance with scheme rules in a fast-paced fintech setting.Key ResponsibilitiesHandle incoming chargebacks in accordance with Visa and Mastercard scheme rulesManage the full dispute lifecycle: first chargeback, representment, pre-arbitration, arbitration, and collaboration / pre-dispute casesAnalyze transaction data to prepare compelling representments and supporting documentationManage disputes across a diverse merchant portfolio spanning low - to high-risk profiles and varied business models

📌 Chargeback Specialist (Madrid)
🏢 Colibrix One
📍 Madrid