Real, anonymous reports from people who interviewed for Software Engineer at Duolingo, newest first and distilled into what to expect across the loop.
The process dragged on much longer than I expected and didn’t feel particularly organized. I went through a standard recruiter screen and then multiple additional phone screens before finally reaching an onsite. The recruiter and subsequent interview steps made it seem like progress was happening, but overall it felt tedious and drawn out.
After a recruiter conversation, I ended up doing a technical screening where the focus was on a coding problem that felt very “standard” for interviews—something like a tree traversal—and then a short follow-up on how I’d improve the algorithm’s efficiency. The interviewer kept the conversation moving, and even though the core question wasn’t unfamiliar, the additional optimization questions made me slow down and think more carefully about complexity.
The interview process typically starts with an online coding assessment, followed by multiple technical interviews that may include both remote and onsite formats. Candidates often noted that the timeline felt lengthy and disorganized, leading to fatigue by the time they reached the final stages.
Candidates faced a variety of technical assessments, including online coding tests and live coding interviews, often focusing on standard algorithmic problems like tree traversals and graph logic. The difficulty level generally increased with each round, and some candidates felt the assessments were heavily score-driven with little room for error.
Behavioral interviews were a part of the process, often using STAR-style questions to assess candidates' teamwork and problem-solving approaches. The overall tone of these interactions varied, with some candidates experiencing a more supportive environment while others felt the interviewers were disengaged.
Several candidates participated in pair programming exercises that mimicked real-world engineering tasks, such as debugging existing code. This format was appreciated for its practical approach but also added pressure as it required candidates to think on their feet.
Interviewer engagement varied significantly, with some candidates reporting positive interactions while others noted distractions or a lack of focus from interviewers, which negatively impacted their performance. This inconsistency contributed to feelings of dissatisfaction with the overall experience.
Candidates expressed concerns about the clarity and timeliness of feedback throughout the process, with some experiencing long waits for responses or feeling that the feedback did not accurately reflect their performance. This lack of communication contributed to a sense of uncertainty and frustration.