Mercor Software Engineer interview with a five-hour virtual super day

Mercor·Software Engineer·Reported May 2026
OtherRejectedHard

My process started with a recruiter call, followed by an AI-driven stage where I answered LeetCode-style questions and additional technical prompts. After that, I went through a longer "super day" style setup. Mine was virtual and lasted about five hours in total, combining system design, coding, and what they called vibe coding on the same day.

It was on the harder side, although I also felt like I was talking with real engineers rather than only grinding through puzzles. Looking back, the difficulty came mostly from the volume and variety across the rounds instead of one especially tricky topic. By the time I reached system design and coding in the same stretch, I was exhausted, but I was still engaged by the technical conversations.

Location: United States. Overall feedback: Neutral. Offer status: No offer.

Published

Curated and edited by PracHub

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Interview at a glance

Company
Mercor
Role
Software Engineer
Rounds
Other
Outcome
Rejected
Difficulty
Hard
Date
Reported May 2026

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