Machine Learning Engineer, Next-Generation Recommendation Systems

Build next-generation ad recommendation and ranking systems for billions of monthly game-engine users. Design and evaluate models using LLMs, RLHF, preference learning, and reinforcement learning to improve relevance, conversion, value estimation, and real-time bidding outcomes. Run causal inference, A/B testing, and offline evaluations, and partner with engineering to deploy research ideas end-to-end from training data to production models while communicating results across technical and non-technical teams.