Duolingo Data Scientist Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 9 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Duolingo.
Duolingo
Data Scientist Intern
Intern Easy Neutral experience No offer 2 rounds
Interview process
Take home Technical screen
Interview formats
Behavioral Coding Technical
I did a take-home task first, then I had interviews with employees. The interviews were pretty straightforward. They focused on behavioral aspects, data cleaning, machine learning, and a SQL coding test. There wasn't any probability or stats involved. They seemed more interested in the details of data manipulation compared to other companies. It felt like they were looking for someone with a specific background.
Confirmed questions1 question
- Tell me about a time you collaborated with a team.
Duolingo
Data Scientist
Mid Average Negative experience No offer 1 round
Interview process
Take home
Interview formats
Technical
I received a take-home assignment with a 48-hour deadline, and they suggested I spend 4-6 hours on it. I ended up dedicating much more time and effort, but unfortunately, I was rejected without any feedback. I also spent a lot of time on the cover letter, and I thought my analysis was good. It would have been helpful to get some feedback on how I could improve, given the time I invested.
Confirmed questions1 question
- Analyze the provided dataset.
Duolingo
Data Scientist
Senior Difficult Positive experience Accept offer 6 rounds
Interview process
Recruiter call Phone screen Presentation Technical screen Onsite Background check Offer
Interview formats
Behavioral Technical Coding Presentation
First, I had a phone screen with the recruiter. Then, I had a Zoom call with the Hiring Manager where we worked on modeling a business problem. The next step was a virtual onsite with a few people from the Data Science team. This included a welcome video about the company and culture, a presentation of a DS project I had done, a deep dive into the project methods, a behavioral 'culture add' chat, an SQL assessment, and a final chat with the Hiring Manager.
Confirmed questions4 questions
- Can you present a past DS project that you have led?
- What were your reasons for choosing a specific approach for a project, as opposed to other possible methods?
- Show your skills in standard SQL querying, involving joins, ranking, etc.
Duolingo Data Scientist Interview Questions
Quoted word for word from Duolingo interview reports.
“Given the dataset, what factors predict users who are likely to unsubscribe from Duolingo Plus?”
Read reports →“Can you use an AI tool to perform analysis?”
Read reports →“Can you write SQL queries to solve this problem?”
Read reports →“How would you approach this business problem?”
Read reports →“What were your reasons for choosing a specific approach for a project, as opposed to other possible methods?”
Read report →“Can you present a past DS project that you have led?”
Read report →“Can you tell me about a data science or research project you've worked on?”
Read report →“Tell me about a time you collaborated with a team.”
Read report →Formats, difficulty and experience
Across all 9 Duolingo interview reports.