I went through a very technical multi-round process for the Data Scientist role over roughly a month, with heavy math focus and no offer.
Initial technical rounds (6+ total) — multiple interviews centered on calculus, probability, and statistics, plus a few brain-teaser style questions.
4 months ago
Difficult Neutral United States
I applied for the Data Scientist role and ran into a hard, multi-step technical pipeline spanning HR outreach to timed assessments, ending without an offer.
HR outreach — initial contact after applying online.
5 months ago
Average Positive New York, NY
I interviewed for the Data Scientist role in an “average” difficulty track that moved from an OA into a superday of technical deep-dives over a short …
7 months ago
Difficult Positive South Africa
I went through a difficult HackerRank + technical interview sequence for the Data Scientist role, combining SQL/coding with stats-heavy conversations.…
7 months ago
Average Neutral New York, NY
I interviewed for the Data Scientist role with a moderately challenging HackerRank screen that included SQL and Python, followed by no further rounds …
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What to expect
Distilled from the reports
Initial Assessment
Most candidates begin with an online assessment on HackerRank, which typically includes SQL and coding questions, often with a focus on probability and statistics. The difficulty of this assessment is a common barrier to progressing further in the interview process.
HackerRankSQLProbability
Technical Interviews
Candidates experience multiple rounds of technical interviews that delve into statistical concepts, coding challenges, and data analysis, often requiring a strong grasp of mathematical principles and practical problem-solving skills.
TechnicalStatisticsCoding
Take-Home Projects
Some candidates are assigned substantial take-home projects that require independent thinking and problem-solving, which are followed by discussions or presentations in later interview stages.
Take-HomeIndependent ProjectPresentation
Behavioral and Experience Focus
Interviews often include behavioral components where candidates discuss their past experiences in detail, with a strong emphasis on how their background aligns with the role and the company's needs.
BehavioralExperienceSTAR
Overall Difficulty and Structure
The interview process is generally perceived as challenging, with candidates noting a structured approach that can include multiple rounds and a high level of technical scrutiny throughout.
DifficultyStructuredMulti-Round
Follow-Up and Communication
Candidates report varying experiences with follow-up communication, with some noting a responsive timeline while others experienced delays or a lack of communication after submitting assessments or projects.