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Mercor Data Scientist Interview Experience

Mercor · Entry level

ResultRejected
Timespan3 weeks
DifficultyVery difficult
Rounds4

Interview process

The process was rigorous.

Be prepared to explain your projects in depth during the screenings and behaviorals. Be able to answer why you made X decision over Y.

For the on-site, it will be in-person for an entire day (11am-7pm). It will require SQL (Leetcode mediums), an analytics exercise working through messy data with Python (be prepared to work fast, you can use AI tools), a written portion explaining how you would go about building certain models, and a final product sense interview.

Interview rounds · 4

  1. 1

    Recruiter screen

  2. 2

    Phone screen

    The had another technical round which asked basic JOINs questions.

    1. Q1. Given a hypothetical situation of unclean tables and how to join two messy tables without duplicate values
  3. 3

    Technical round

    1. Q1. Basics on joins
  4. 4

    Final / onsite round

    1. Q1. How would you increase growth to Mercor's user base?

Tips from the candidate

I wish I knew how to work faster for the analytics exercise because there is a lot of information to work through.

Company culture

They have a 996 culture, and they're direct about that.

Details

CompanyMercor
RoleData Scientist
LevelEntry level
LocationUnited States
InterviewedJan 2026
Questions asked3