Roku’s footprint has more than quadrupled in the past five years, and user expectations have leaped just as fast—think LLM-based query understanding, vector-DB retrieval, on-device models, and multimodal search (voice, text, image). We’re now rebuilding our relevance stack for the next decade, blending classic IR with generative-AI techniques. You will be a technical leader spearheading that transformation. You will apply state-of-the-art ML on search using techniques in deep learning, bandits, transformers, LLMs, causal inference, and optimizations to make our users more delighted and engaged on the platform. You will collaborate with US engineering teams as well as cross-functional teams to translate business requirements into technical specifications, and provide technical leadership to drive the technical and ML roadmap for search ranking and monetization. This is a high-impact role where you will nurture our ML ecosystem to withstand scale, developer velocity, and future business shifts.