ApplySarthiAI Research Intern (PhD)
Duolingo
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This role on the market
1,489 open research roles across 255 companies are on ApplySarthi right now, most of them in Bengaluru (43), Mumbai (22), Delhi NCR (13).
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What research roles keep asking for: Python (36%), Machine learning (33%), PyTorch (19%), LLMs (16%), Deep learning (15%), C++ (13%) — counted across their open postings here.
C++ jobs · Java jobs · MATLAB jobs · Machine learning jobs
Duolingo has 62 open roles listed here.
- Product Designer, Thrive Intern
- Talent Mobility Specialist
- Staff Security Engineer
- Senior Business Development Manager, China
- Senior Recruiter, Leadership
Counted across 14 company job boards, updated as roles open and close.
Preparing for this interview
Interviews for research roles keep coming back to Python, Machine learning, PyTorch, LLMs. Practise those questions before you sit with Duolingo.
Questions you are likely to be asked
- Why do you want to join Duolingo?
- What is your experience with C++? Tell me one thing you learned the hard way.
- What would you check first if a model's accuracy dropped after going live?
- When would you not use machine learning for a problem?
- Walk me through a model you built, from the data to how it was used.
Prep Sarthi gives you a free mock interview: an AI interviewer asks you questions like these out loud, from your own CV and this job, and shows your score and your weakest answer.
Practise the AI Research Intern (PhD) at Duolingo interview free →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.
🧠 You Will...
- Apply AI methods to massive real-world datasets
- Prototype new models, evaluate with small scale experiments, and/or productionize solutions at scale
- Work with a cross-functional team of world class researchers, engineers, and others to build new product features and/or publish state-of-the-art findings
- 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
✅ You Have...
- Pursuing a PhD in artificial intelligence, machine learning, natural language processing, or related field
- Graduation expected by August 2028
- Contributions to research communities and efforts, including publishing papers at conferences such as ACL, CVPR, EDM, ICML, NeurIPS, etc.
- A portfolio of impactful work, in the form of (for example) publications, open-source projects, or AI internships
- Experience implementing AI systems in Python, Java, Scala, or C/C++ (i.e., not just R or MATLAB)
- A creative, interdisciplinary, and entrepreneurial approach to R&D
- Strong debugging and critical thinking skills
- 12 week consecutive availability
- May 24, 2027 - August 13, 2027
- June 14, 2027 - September 3, 2027
- Ability to relocate to Pittsburgh, PA or New York, NY
⭐ What you can expect...
- Language learning opportunities
- Catered in-house lunches, and breakfast and dinner options
- Company-wide Hackathon
- PTO and company holidays
- Frequent company-wide dinners, monthly celebrations, social clubs, and so much more!
Connect with your recruiter on the benefits for interns at Duolingo!
Benefits: Take a peek at how we care for our employees' holistic well-being with our benefits here.
Job Alerts: Sign up for job alerts here.
Accommodations: We will do everything we can within reason to make sure that your interview takes place in an environment that fairly and accurately assesses your skills. If you need assistance or accommodation, please contact accommodations@duolingo.com.
Equal Employment Opportunity: Duolingo is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.
Fraud Warning: Unfortunately, there is a rise in scammers pretending to be real Duolingo employees. Duolingo and our employees will never ask for your Social Security number, bank details, or passport info, and we’ll never ask you to deposit a check, purchase equipment, or exchange money during the interview process. Real Duolingo employees always use an email that ends in @duolingo.com or @recruiting.duolingo.com. Stay alert and double-check these details before sharing any information.
By applying for this position your data will be processed as per the Duolingo Applicant Privacy Notice.
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Listed on greenhouse · posted 2026-11-06. ApplySarthi collects openings and links to application pages; the role is advertised by Duolingo, not by us.