Software Engineer II applicants have rated the interview process at Duolingo with 3.5 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 47.5% positive. This is according to Glassdoor user ratings.
Common stages of the interview process at Duolingo as a Software Engineer II according to 2 Glassdoor interviews include:
Phone interview: 33%
One on one interview: 33%
Skills test: 33%
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I applied through an employee referral. I interviewed at Duolingo (New York, NY) in Apr 2026
Interview
Had a recruiter call and then technical screening. Coding question was a standard preorder tree traversal questions. There were some followup questions about how to make the algorithm more optimal
Other Software Engineer II Interview Reviews for Duolingo
The interview process varies a bit depending on which role/level you're applying for. Software engineering roles will have several phone screen/technical interviews before a virtual "on site" day. The on site will have a few different interview types.