Senior Software Engineer, Fraud

Build end-to-end, ML-driven fraud detection and intervention systems that protect the marketplace from malicious activity. Lead architecture across machine learning, backend, and client-side components, including user-graph modeling, collusion detection, and real-time low-latency inference. Train and deploy traditional ML and LLM-powered models, design scalable data pipelines, and create human-in-the-loop workflows to continuously adapt to evolving adversarial tactics.