Duolingo
Staff AI Research Engineer
$221K–$331K
New York, NY +3 · Staff · Full-time · Posted Jun 26, 2026
- Location
- New York, NY
Pittsburgh, PA
New York, New York, United States
Pittsburgh, Pennsylvania, United States - Education
- Advanced degree in Computer Science, Engineering, or a related field focused on machine learning or artificial intelligence, or equivalent experience.
About the job
Develop and deploy machine-learning systems for Duolingo Monetization that improve learning experiences while supporting business goals, including balancing revenue and retention.
What you'll do
- Develop and train bandit models and large-scale neural networks.
- Work with cross-functional teams to align model outputs with company objectives and contribute to product and business decisions.
- Mentor teammates and help deliver scalable, efficient machine-learning solutions.
What they ask for
- Proven experience as an AI research engineer, such as in LLMs, bandits, or computer vision.
- Strong background training and fine-tuning large models in an applied setting.
- Deep understanding of machine-learning concepts, frameworks, and best practices.
- Leadership and communication skills, including the ability to manage and inspire a team.
Pay
$220,800 — $331,200 USD base salary
Tools
large language models, multi-armed bandits, reinforcement learning
AI focus
Build AI systems for monetization, including bandit models that balance revenue and retention; work across the ML stack, including training data, fine-tuning, reinforcement learning, evaluation, deployment, and monitoring.
Model-written summary · the original posting is authoritative