AI Research Engineer
Duolingo is seeking a Staff AI Research Engineer for their Monetization team. This role involves developing and deploying AI systems, including bandit and large-scale neural network models, to enhance the learning experience and drive business growth. The ideal candidate will have extensive experience across the full ML stack and a strong background in various machine learning techniques.
We are looking for an experienced AI Research Engineer to join our Duolingo Monetization team. The ideal candidate will have a proven track record as an AI research engineer, with extensive experience across various machine learning techniques including large language models, multi-armed bandits, and more. They will have experience at all levels of the ML stack, including feature engineering, developing training data, fine-tuning, reinforcement learning, quality evaluations, deployment, and monitoring. On the Monetization team, we’re building AI systems to improve the learning experience while driving our business, including deploying our research into bandit models to balance revenue and retention. Given the broad set of AI domains, broad experience in AI/ML is highly desirable.
Posted June 2, 2026