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$220,800 – $331,200
Listed on Duolingo’s own careers site. You apply with them directly — we never stand between you and the employer.
What this role is
Duolingo is hiring an experienced AI Research Engineer to join their Monetization team, where you'll develop and deploy machine learning systems that balance learning quality with revenue growth. The role combines hands-on model development—including large language models and multi-armed bandits—with strategic leadership, mentorship, and cross-functional collaboration on a product affecting hundreds of millions of learners.
Our summary, not Duolingo’s wording. The full posting is on their site.
Skills this role names
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What they ask for
Required
- Proven experience as an AI research engineer in LLMs, bandits, computer vision, or related fields
- Strong background in training and fine-tuning large models in applied settings
- Advanced degree in Computer Science, Engineering, or related field with focus on machine learning or AI, or equivalent experience
- Deep understanding of machine learning concepts, frameworks, and best practices
- Excellent leadership and communication skills with ability to manage and inspire a team
Nice to have
- Broad experience across various machine learning domains
- Familiarity with feature engineering, training data development, quality evaluations, deployment, and monitoring
- Experience deploying research into production systems