Lead Machine Learning Engineer

Lead a team of 3-5 ML engineers building personalization systems. Architect multi-stage ranking systems (retrieval → ranking → re-ranking). Define technical roadmap aligned with business objectives. Drive improvements in model quality, system reliability, and development velocity. Establish best practices for model development and deployment. Partner with product, data science, and engineering teams. Contribute hands-on to critical model development (50% coding). We're looking for someone with deep expertise in large-scale personalization systems and experience with modern ML architectures.