Mercor·Software Engineer

Mercor Software Engineer interview experience

No offer

Hard

Neutral

United StatesPosted May 2026 · Candidate report, summarized by Dataford

My process started with a recruiter call, then I went through an AI-driven stage where I answered LeetCode-style questions plus some additional technical prompts.

After that, things moved into a longer “super day” style setup. Mine was virtual and ended up being about five hours total, combining system design, coding, and what they called vibe coding as part of the same day.

It was definitely on the harder side of the spectrum, even though it also felt like I was speaking with real engineers more than just grinding through puzzles. When I looked back, the difficulty mostly came from the volume and variety across the rounds rather than a single tricky topic—by the time I reached system design and coding in the same stretch, I was exhausted but still

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