As a Principal Business Analyst, Fraud, you will design and test the defenses that stop fraudulent applications. Key responsibilities include: digging into application data to identify emerging fraud patterns and vulnerabilities; designing, building, and running A/B and Champion/Challenger tests for real-time defenses; translating test results into data-backed recommendations; building and maintaining dashboards to track performance; partnering with Operations, Product, Data Science, and Engineering; and mentoring less experienced analysts. Minimum qualifications: 2+ years of experience in a highly analytical role (e.g., risk, business analytics, data science) working directly with data; experience with credit cards or consumer lending products; hands-on experience with A/B or Champion/Challenger testing; strong familiarity with SQL, Python, or other data analysis tools; and a Bachelor's or Master's degree in a quantitative field. The role requires the ability to travel 4-6+ times per year for in-person collaboration.