We are looking for a Senior Architect to lead the technical strategy and transformation of our Trade Surveillance platform . This is a high-impact role partnering with Enterprise Architecture, Compliance, Quant, and Engineering teams to build the next-generation surveillance ecosystem. Role Overview You will drive the multi-year modernization roadmap , transitioning from a Q/KDB-based stack to a cloud-native Python/PySpark architecture , while ensuring scalability, regulatory compliance, and engineering excellence. Key Responsibilities Architecture & Strategy Define and evolve the trade surveillance technology roadmap Own end-to-end architecture: Scenario development Alert generation Case management & investigator tooling Establish architecture standards, patterns, and engineering guardrails Surveillance & Scenario Engineering Design surveillance scenarios covering: Spoofing, layering, wash trades Insider trading, front-running Cross-product manipulation Engineer solutions across Q/K...