Data Scientist at Weni by VTEX

Remote - Brazil

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As a Data Scientist, you will join the AI Models team at Weni by VTEX, a business unit of VTEX. You will be responsible for researching, developing, and improving machine learning models that power our conversational agents and multi-agent systems. Your duties include designing and implementing machine learning models, analyzing large datasets, collaborating with engineers and product managers to bring AI models from prototype to production, continuously evaluating model performance, and performing exploratory data analysis to inform hypothesis generation and experimental design for conversational AI systems.

Requirements

Education

  • Bachelor's degree in Computer Science, Engineering, Statistics, Mathematics, or related fields

Experience

  • Experience using Git for code version control
  • Hands-on practice with scikit-learn, pandas, and other data-related frameworks
  • Knowledge of Deep Learning
  • Experience with cloud services (AWS) for storage, pipelines, and deployment
  • Monitoring of performance, data drift, and data quality in production
  • Familiarity with GenAI/LLMs (prompt engineering, fine-tuning, hallucination evaluation)

Skills

  • Python
  • scikit-learn
  • pandas
  • Deep Learning
  • AWS
  • Git
  • data analysis
  • performance monitoring
  • critical thinking
  • problem solving
  • communication
  • collaboration

Responsibilities

  • Research, design, and implement machine learning models to improve the performance of conversational agents and multi-agent systems.
  • Analyze large datasets to extract insights that guide model improvements and product decisions.
  • Work closely with engineers and product managers to bring AI models from prototype to production.
  • Continuously evaluate model performance and iterate based on real-world usage and feedback.
  • Perform exploratory data analysis (EDA) to uncover hidden structures, anomalies, and relationships in data, informing hypothesis generation and experimental design for conversational AI systems.

Technologies

PythonGitscikit-learnpandasDeep LearningAWSGenAI/LLMs

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