Process
The interview process included two video interviews to test algorithms and app design fundamentals, followed by three rounds of onsite interviews. The onsite portion consisted of:
- App coding
- Algorithms questions
- System design
Things went well, and I received an offer. However, a week before my scheduled start date, they rescinded it, presumably due to the current economic downturn. Now, I'm scrambling to find another job before my visa expires and I have to leave the country. It was a terrible experience.
Questions
Given a trace of add and pop operations, determine whether a data structure could be a stack, priority queue, or queue.
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Interview Statistics
The following metrics were computed from 9 interview experiences for the Duolingo Senior Software Engineer role in United States.
Success Rate
Duolingo's interview process for their Senior Software Engineer roles in the United States is fairly selective, failing a large portion of engineers who go through it.
Experience Rating
Candidates reported having good feelings for Duolingo's Senior Software Engineer interview process in United States.
Duolingo Work Experiences
- 4.0Smart Team, Monetization ConflictsSenior Software Engineer • Current EmployeeDecember 19, 2016Pros: - Smart co-workers - Work is impactful - Great perksCons: - Some monetization strategies conflict with the company's vision. - The company often socializes together, which is part of the culture. This can lead to potential favoritism based on friendships and intercompany relationships.
- 5.0Great culture, but management could be more collaborativeSenior Software Engineer • Current EmployeePittsburgh, PAOctober 6, 2026Pros: Great culture and mission. Going to work is something I look forward to most of the time. People are kind, smart, and fun.Cons: Top-down management without sufficient delegation to middle-level management.
- 4.0Good pay and cultureSenior Software Engineer • Former EmployeePittsburgh, Pennsylvania, United StatesAugust 7, 2025Pros: Good pay and culture. The CEO is a genius.Cons: Culture on the other hand can seem cliquey, especially if you are not 100% into it.
Duolingo Interview Questions
