Principal Applied Scientist, Generative AI

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Principal Applied Scientist, Generative AI based in the United States. As Principal Applied Scientist, Generative AI, you will define the scientific direction for advanced large language models powering next-generation AI-driven home-shopping experiences. You will lead and mentor a team of applied scientists while remaining deeply involved in research, experimentation, and technical execution. Your work will focus on LLM post-training, reward modeling, and evaluation to improve the quality, reliability, and effectiveness of agentic AI systems. You will translate cutting-edge advances in generative AI and reinforcement learning into practical innovations that serve millions of users. Working in a collaborative, research-driven environment, you will partner with Product, Engineering, Platform, and Data teams to turn ambitious ideas into measurable product outcomes. This is an opportunity to influence AI strategy, solve complex scientific challenges, and shape intelligent consumer experiences at significant scale.