Job Summary: We are seeking a Senior Data Scientist (Fraud Prevention) to build and evolve fraud prevention strategies for digital payments. Key Highlights: 1. Practical experience in fraud prevention within digital payment environments. 2. Responsible for building and evolving fraud prevention strategies. 3. Collaboration with Product, Payments, and Risk teams. At Bemobi, we value an innovative spirit and collaborate to help people maximize their best selves—and together, we identify affinities and opportunities. If you seek growth, challenges, and an excellent work environment, you’re in the right place! We are looking for a **Senior Data Scientist (Fraud Prevention)** with practical experience in **fraud prevention within digital payment environments**. This role sits at the intersection of data engineering, advanced analytics, and fraud risk modeling. You will build and evolve fraud prevention strategies, support and develop fraud risk scoring models, and strengthen the resilience of our payments ecosystem. We seek someone who understands the dynamics of online payment fraud, is comfortable working with large volumes of data, and is metrics- and impact-driven—with measurable business outcomes. **\#SejaBemober** **Responsibilities and Duties** **What You’ll Do** ------------------------ * Design and maintain data pipelines using **Airflow (DAGs)** to support fraud detection workflows * Process and analyze large volumes of transactional data using **Spark** * **Develop, evaluate, and monitor fraud risk scoring models** * **Conduct exploratory analyses to identify fraud patterns, anomalies, and emerging risk behaviors** * **Create and maintain dashboards for monitoring fraud KPIs (approval rate, chargeback rate, fraud rate, false positive rate, etc.)** * **Collaborate with Product, Payments, and Risk teams to evolve fraud prevention strategies** * **Contribute to MLOps and ML Engineering practices** for deployment and monitoring of fraud models * Participate in discussions on anti-fraud strategy, risk exposure, and product health * Ensure decisions are driven by clear metrics and balanced between risk and conversion **What We Expect From You** --------------------------- * Approximately **3–4 years of professional experience**, with relevant background in **fraud prevention** * Solid understanding of **digital payment flows** (authorization, capture, chargeback, dispute lifecycle, etc.) * Experience developing or supporting **fraud risk scoring models** * Strong analytical capability and ability to translate business risk into data-driven solutions * Proactive mindset with strong ownership mentality * Comfort operating in multidisciplinary environments (Risk, Product, Payments, Data) * Metrics-driven decision-making * Continuous curiosity and interest in improving fraud model and strategy performance * Conversational Spanish (intermediate or higher level) **Requirements and Qualifications** * Experience with **Airflow** and data pipeline development * Experience with **Spark** for large-scale data processing * Consistent experience in **fraud analysis and risk modeling** * **Experience building and monitoring fraud scoring models** * **Experience creating dashboards and tracking fraud KPIs** * **Knowledge of MLOps and ML Engineering** * **Strong proficiency in SQL and data analysis** * Conversational Spanish **Nice-to-Haves** ---------------- * Experience with **Terraform** * Experience with process automation * Experience with cloud environments (AWS, GCP, or similar) * Experience with real-time fraud detection systems * Knowledge of statistical techniques or Machine Learning applied to imbalanced datasets **Additional Information** **WHAT YOU’LL FIND HERE!** **Bradesco National Health Plan \- extended to dependents at no additional cost per beneficiary;** **Bradesco Dental Plan \- optional;** **Flexible VR/VA \- maintained during vacations;** **PLR \- profit-sharing program;** **Wellhub;** **Birthday day off;** **Home Office Allowance;** **Transportation Voucher (VT) as needed \- lawful payroll deduction permitted;** **Zurich Life Insurance;** **Free access to all our products \- AppsClub, Discounts Club, TrueCaller, BTFit, and Busuu;** **Access to internal training via digital platforms;** **Internal peer recognition program \- Bemobucks.** #### **A pioneering technology company offering mobile solutions and platforms for digital services, microfinance, and payment methods.** **At Bemobi, we value innovation and encourage everyone to reach their best version. If you seek growth, challenges, and an excellent work environment, this is the right place! ** #### **We began our journey in 2009 in Brazil and today are a publicly traded multinational corporation present in 50 countries.** **We operate under a B2B2C model, partnering with major companies across telecom, digital banks, e-wallets, e-commerce, and more recently, utilities.** #### **With a focus on excellence, innovation, and security,** **we connect millions of users to a broad and innovative portfolio of solutions**, thereby contributing to the **democratization of access to digital services in Brazil and worldwide.** #### **We believe in** **diversity and the plurality of ideas that become action** **through our \#Bemobers, who foster a culture of continuous learning and constant improvement focused on innovation. This year, we were awarded the GPTW (Great Place to Work®) certification for the 10th time and recognized as the **14th best company to work for in Rio de Janeiro.** #### **Be yourself, \#SejaBemober.**