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Data Scientist (Start-Up)

Kaizen Stackup
Full-time
On-site
San Fransisco, California, United States
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Qualifications & Experience

  • Minimum of 4+ years of hands-on experience in data science within high-performing product analytics environments, ideally supporting B2B software platforms.

  • Advanced proficiency in Python and SQL, including strong working knowledge of pandas, NumPy, StatsModels or Scikit-learn, and experience working within modern data warehouses such as BigQuery or Snowflake.

  • Strong command of statistical sampling methodologies, including stratified sampling, bootstrapping techniques, and reliable extrapolation approaches.

  • Proven track record of independently designing, building, and deploying analytics tools or frameworks that were successfully adopted by product, growth, or cross-functional teams.

  • Deep expertise in experimentation and causal measurement, including A/B testing, difference-in-differences analysis, propensity score matching, matched market testing, and statistical power calculations.

  • Hands-on experience working with large language models (LLMs), including prompt design, embedding strategies, and evaluating or mitigating hallucination risks.

  • Exceptional written and verbal communication skills, with experience delivering executive-ready insight reports tailored to product, design, and engineering stakeholders.

  • Highly autonomous operator who performs well in ambiguous environments, prioritizes effectively, and drives initiatives from concept through completion with minimal oversight.

  • Demonstrated ability to quickly adopt new tools and methodologies, consistently implementing process improvements that reduce analysis turnaround time.