Senior Staff Machine Learning Engineer, ML Understanding

Lead Reddit’s next-generation user understanding initiative by designing and implementing a unified, high-fidelity user representation (embeddings, tags, attributes, LLM-based profiles) and scaling it across Feeds, Search, Notifications, and Ads. Drive adoption with product and infrastructure teams, leverage LLMs and foundation models to improve personalization at global scale, and mentor senior engineers while shaping end-to-end ML systems.