Process
I had my first-round interview.
The question seemed doable. Just make sure to know your data structures, and you should be fine.
I solved it without much help, but I was still rejected.
The interviewer was chill, though.
Questions
Given some operations, identify the data structures.
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Interview Statistics
The following metrics were computed from 3 interview experiences for the Duolingo Software Engineer - New Grad role in United States.
Success Rate
0%
Pass Rate
Duolingo's interview process for their Software Engineer - New Grad roles in the United States is extremely selective, failing the vast majority of engineers.
Experience Rating
Positive67%
Neutral33%
Negative0%
Candidates reported having very good feelings for Duolingo's Software Engineer - New Grad interview process in United States.
Duolingo Work Experiences
5.0
Friendly, smart people
Software Engneering Intenr • Former Employee
August 11, 2022
Pros: Work-life balance
Friendly people
Fun work environment
Company-sponsored interest clubs
Breakfast and lunch
Cons: Pittsburgh is small, but I personally don't consider it a con. It's a really fun and pretty city.
5.0
Great culture and mission
Software Engineer • Current Employee
New York, NY
April 29, 2026
Pros: There were great people, an awesome culture, a wholesome mission, and interesting work.
Cons: It is a bit slow. Given the company size and focus on building apps, it sometimes lacks truly technically challenging work, although there is still a lot if you look for it.
5.0
Amazing company, wonderful humans
QA Lead • Current Employee
East Liberty, Pennsylvania, United States
May 3, 2019
Pros: Working at Duolingo has been nothing short of amazing. I've had an opinion on everything that I've worked on since I've started. I work on a really great team of developers, designers, and PMs, and working so closely every day, we've formed some great bonds. Many of my coworkers I consider close friends.
The open office makes it easy to get to know everyone and become familiar with almost everyone you're working with.
Cons: I can't think of any downsides to working at Duolingo.
- 5.0Friendly, smart peopleSoftware Engneering Intenr • Former EmployeeAugust 11, 2022Pros: Work-life balance Friendly people Fun work environment Company-sponsored interest clubs Breakfast and lunchCons: Pittsburgh is small, but I personally don't consider it a con. It's a really fun and pretty city.
- 5.0Great culture and missionSoftware Engineer • Current EmployeeNew York, NYApril 29, 2026Pros: There were great people, an awesome culture, a wholesome mission, and interesting work.Cons: It is a bit slow. Given the company size and focus on building apps, it sometimes lacks truly technically challenging work, although there is still a lot if you look for it.
- 5.0Amazing company, wonderful humansQA Lead • Current EmployeeEast Liberty, Pennsylvania, United StatesMay 3, 2019Pros: Working at Duolingo has been nothing short of amazing. I've had an opinion on everything that I've worked on since I've started. I work on a really great team of developers, designers, and PMs, and working so closely every day, we've formed some great bonds. Many of my coworkers I consider close friends. The open office makes it easy to get to know everyone and become familiar with almost everyone you're working with.Cons: I can't think of any downsides to working at Duolingo.
Duolingo Interview Questions
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