Duolingo·Backend Engineer

Duolingo Backend Engineer interview experience

Got offer

Medium

Positive

Pittsburgh, PAPosted Sep 2019 · Candidate report, summarized by Dataford

My interview journey had a simple shape: two technical phone screens followed by a full day of technical interviews.

The day of interviewing leaned heavily into algorithm work, with a few behavioral and prior experience questions mixed in along the way.

I also had one system design question included in the overall set, which was a noticeable shift from the more coding-heavy flow. Every interview was focused on problem-solving, but the system design piece made the day feel more varied.

I didn’t get an offer, and the overall difficulty felt like a standard middle tier—challenging enough to matter, but not wildly unpredictable. The biggest takeaway for me was how technical the entire day was and how much

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