There are three rounds of interviews. The first is a non-technical interview with a manager. The second is a presentation about a past project. The third contains SQL, behavioral, data science design. Difficulty in general is ok.
I applied online. I interviewed at Duolingo (Pittsburgh, PA) in Nov 2025
Interview
Take home test: a data science project using the data the provided, it's about user clustering
30 minutes first round interview: meet hiring manager, discuss about why Duolingo, why DS
Virtual onsite
Interview questions [1]
Question 1
Describe a project related to data science/ research.
Take home task and then interviews with employees. Straightforward interviews - behavioral, data cleaning, machine learning, SQL coding test (no probability or stats). Focused more on details of the actual data manipulation than other firms. Felt like they were looking for a person of a specific background
Interview questions [1]
Question 1
Can you describe a time when you worked in a team?
