Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in! At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun. Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.  Read our blog to learn more. About the role... 🧠  You will... • Solve our most ambitious problems with the right tool for the task • Collaborate cross-functionally to bring your ideas to life in the product • Identify problems, prototype solutions, evaluate their return on investment, and then implement the best solution at scale to improve the lives of our millions of learners each day • Share your findings both within Duolingo as well as to the broader research community ✅  You have... • You have an Ph.D. in computer science or related technical field (or expect to by August 2027) • A portfolio of impactful work, in the form of (for example) publications, open-source projects, or AI internships • Ability to relocate to Pittsburgh, PA or New York, NY • A creative, interdisciplinary, and entrepreneurial approach to R&D • Strong debugging and critical thinking skills ❤️  Why you'll love working here... • Language learning opportunities • Catered in-house lunches and breakfast • Company-wide Hackathon • PTO and company holidays • Frequent company-wide dinners, monthly celebrations, social clubs, and so much more! The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supplemented by equity compensation. We encourage you to talk with your recruiter for more information related to compensation for this role! Salary Range: $137,700—$186,300 USD