As a key member of the Risk & Fraud BR Tribe, you will help protect Sum Up’s acquiring business in Brazil, Mexico, and the United States, ensuring that our merchants can operate safely and with confidence. You will join a global, autonomous, cross-functional team committed to building smart, scalable, and frictionless fraud prevention solutions that directly impact business performance and merchant trust. As a Senior Fraud Strategy Analyst, you will take ownership of critical initiatives to detect and prevent Card-Present (CP) and/or Card-Not-Present (CNP) fraud, leveraging data analytics, decision-engine rules, and continuous experimentation to strike the right balance between fraud loss, false positives, and user experience. What You Will Do Analyse large-scale datasets to detect evolving fraud behaviors and propose proactive countermeasures. Design, implement, and optimize rules and strategies within our fraud decision engines. Continuously monitor fraud performance dashboards, investigate anomalies, and respond to threats in real time. Maintain industry-level compliance by turning regulatory and scheme-mandated changes into actionable fraud controls. Build and refresh dashboards for visibility into CP hotlists and CNP risk signals. Communicate insights and recommendations clearly to leadership and cross-functional stakeholders, such as Fraud Ops and Disputes. Produce structured documentation, including strategy manuals and monthly performance reviews. You Will Be Great for This Role If You Have strong SQL and Python skills for analytical workflows and data pipelines. Bring hands-on experience designing and tuning rule-based fraud prevention systems or fraud decision engines. Is capable of creating clean, effective monitoring solutions through BI tools (as Tableau, Power BI, Looker, etc.) Possess applied knowledge in statistics including A/B testing and classification models. Have a deep understanding of fraud patterns and behaviors in Brazilian CP/CNP environments. Have advanced English proficiency. It Will Be a Bonus If You If you have experience with machine learning techniques. Participate in industry working groups, conferences, or webinars related to fraud and risk in Brazil. Understand acquirer settlement flows, chargeback processes, and interchange economics. Why you should join Sum Up Global Experience : Collaborate with a diverse team of 3,000+ people from over 90 countries, and join our global off-sites and hackathons.