Duolingo·Software Engineer

Duolingo Software Engineer interview experience

Got offer

Medium

Neutral

Pittsburgh, PAPosted Jan 2026 · Candidate report, summarized by Dataford

My process started with an online CodeSignal-style assessment, followed by a technical interview that was run through Karat.

The first coding round was on the medium side, and I also dealt with typical depth questions tied to runtime/logic.

Then I moved into a second technical round with a Duolingo software engineer. That one landed a bit higher—more medium-hard than medium—and it felt like they expected a stronger level of reasoning and clean problem execution. After that, the overall journey felt like a pretty classic progression: online test first, then consecutive technical conversations where the difficulty stepped up instead of staying flat. I didn’t get an offer, and the hardest part was knowing exactly

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