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Senior Data Scientist

Square Hiring

 

San Francisco, CA, USA

Posted On: 3 days ago
Experience: 5+ years
Availability: Onsite
Openings: 1
Category: Senior Data Scientist
Tenure: Contract - Corp-to-Corp
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Description

You will design, develop, and deploy machine learning models and GenAI-driven workflows to solve complex engineering and operational problems.

This role is on-site.

Responsibilities

  • Build and tune predictive models using XGBoost, Random Forest, and scikit-learn, evaluating performance via MAE, RMSE, and R².
  • Embed ML models into GenAI multi-agent workflows, implementing RAG pipelines for document intelligence and contextual Q&A.
  • Analyze structured and unstructured datasets from SAP/EES, historical project attributes, and regulatory documentation to perform feature engineering.
  • Support model lifecycle management including versioning, reproducibility, and monitoring for drift, bias, and performance degradation.
  • Provide human-readable explanations for model predictions and recommendations to stakeholders.

Required Skills

  • 5+ years of experience in Data Science, Machine Learning, and Statistics.
  • Proficiency in Python, including NumPy, Pandas, scikit-learn, and XGBoost.
  • Hands-on experience building regression, calibration, and classification models.
  • Strong understanding of model evaluation metrics and error distribution analysis.
  • Experience working with large, complex enterprise datasets and ensuring data quality.
  • Bachelor's degree in a quantitative field or equivalent professional experience.

Preferred Skills

  • Exposure to GenAI/LLM systems, RAG pipelines, and vector search concepts.
  • Familiarity with computer vision outputs, image classification, and non-text data analysis.
  • Experience in utilities, infrastructure, or regulated industries with a focus on AI governance and explainability.

Education

Bachelor's degree

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