This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior ML Engineer based in Brazil. This is a high-impact opportunity for a Senior ML Engineer to lead the development and productionization of machine-learning solutions across credit risk, fraud detection, collections, and conversion optimization.You will translate complex business challenges into robust, measurable AI/ML solutions that directly influence operational efficiency and revenue.The role combines hands-on modeling, data engineering, experimentation, deployment, and ongoing model stewardship.You will work closely with Risk, Product, Operations, and other teams to identify opportunities where machine learning can create meaningful business value.Beyond traditional ML, you will have opportunities to explore LLMs, computer vision, RAG, voice applications, and other emerging AI technologies.This role is ideal for an experienced builder who enjoys ownership, analytical problem-solving, and working in a fast-moving FinTech environment.