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Data Scientist

Arena Intelligence, Inc.

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Location:
United States , Bay Area

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

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Job Description:

As a Data Scientist you’ll explore and reason about the data that powers millions of AI evaluations each week. You’ll generate and test hypotheses, identify causal relationships, and uncover insights that help us understand how frontier models behave in the real world. You’ll collaborate with ML researchers and engineers to design experiments, analyze large-scale datasets, and build statistical frameworks that improve the reliability and interpretability of our AI evaluation systems.

Job Responsibility:

  • Explore and analyze large, complex datasets to uncover patterns, biases, and causal relationships in model behavior and system performance
  • Formulate hypotheses about data quality, evaluation outcomes, and model performance — then design experiments to validate or refute them
  • Build reproducible analysis pipelines using Python, Pandas, NumPy, and Spark to process and interrogate large-scale data
  • Partner with ML researchers and engineers to design metrics and analyses that evaluate how models perform across domains, prompts, and tasks
  • Develop causal reasoning frameworks and statistical methods that help explain why models behave as they do — not just how well they perform
  • Communicate insights (for example, via blog posts) clearly to technical and non-technical partners, informing both research direction and infrastructure improvements

Requirements:

  • 6+ years of experience in data science, ML analytics, or applied research, preferably in AI, ML, or large-scale data environments
  • Strong proficiency in Python, with deep experience in Pandas, NumPy, and distributed frameworks like Spark
  • Expertise in statistical modeling, causal inference, and experimental design
  • Experience reasoning about data distributions, sample quality, and the effects of data distribution shifts
  • Strong communication skills and the ability to collaborate closely with ML researchers and engineers

Nice to have:

  • Background in AI model evaluation
  • Experience working with LLM outputs (for example, LLM-as-a-judge), embeddings, or other large-scale model artifacts
  • Experience with A/B testing
What we offer:
  • Competitive compensation and equity aligned to the markets where our team members are based
  • Comprehensive health and wellness benefits, including medical, dental, vision, and additional support programs
  • The opportunity to work on cutting-edge AI with a small, mission-driven team
  • A culture that values transparency, trust, and community impact

Additional Information:

Job Posted:
February 20, 2026

Employment Type:
Fulltime
Work Type:
Hybrid work
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