Compass
Compass
Compass is a real estate and media company focused on helping people navigate the housing market. Its content and services cover market analysis, home buying, selling, renting, mortgages and financing, appraisals, affordable housing, property investment, staging, maintenance, and renovation. The company serves homebuyers, sellers, renters, real estate agents, and investors with practical guides and timely housing insights designed to support decisions throughout the property lifecycle.

Senior Data Scientist - Remote in Brazil

Lead predictive modeling, retrieval-augmented generation, and generative AI work in a senior data science role. Build cloud pipelines and APIs across AWS and Azure.

Description

  • Build predictive models and machine learning algorithms for complex business challenges, from exploratory analysis through validation and interpretation, with measurable outcomes.
  • Apply Python, Scikit-learn, XGBoost, LightGBM, Jupyter, Databricks, MLflow, Statsmodels, and SciPy across supervised, unsupervised, and deep learning projects.
  • Evaluate RAG systems using token usage, latency, semantic similarity, BLEU, and ROUGE to assess cost and response quality.
  • Create vector-database ingestion pipelines with AWS OpenSearch and develop LangChain and LangGraph APIs integrated with OpenAI and AWS Bedrock.
  • Use AWS services, serverless and containerized architectures across AWS and Azure, and Azure Document Intelligence for document processing.

Requirements

  • Demonstrated professional experience with Python.
  • Experience developing machine learning models and using data science libraries such as Scikit-learn, XGBoost, and LightGBM.
  • Practical experience with large language models and generative AI, particularly agent-based architectures and retrieval-augmented generation.
  • Experience working with Databricks.
  • Experience using LangChain and LangGraph.
  • Experience with MLflow or comparable experimentation tools.
  • Experience with AWS Bedrock.
  • Knowledge of language-model evaluation metrics such as BLEU and ROUGE is advantageous.
  • AWS experience plus knowledge of Azure is required.

Benefits

  • Remote work.
  • Consideration for candidates with disabilities.

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