Mercari Software Engineer interview experience

There weren’t any theory questions—just two machine-coding style problems on the platform. The whole thing was framed like a coding exercise rather than a conceptual quiz.

After that, the process moved quickly enough that it didn’t feel like I was waiting around too long. What stood out most was the need to be comfortable with HackerRank itself, not just the problem-solving. I practiced a bit on React-related questions on HackerRank beforehand just to get used to the flow and UI, and that made the actual test feel less stressful.