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Senior Data Scientist

EPAM Systems

Remote, Remote, Brazil Full-time July 10, 2026

Found Description

Senior Data Scientist

We are seeking a Senior Data Scientist with expertise in Large Language Models (LLMs) and Python to develop AI-powered chatbot solutions for specialized use cases.

The ideal candidate has a strong background in Natural Language Processing (NLP) and Conversational AI, with experience in hallucination prevention, Responsible AI & compliance, and data analysis.

Responsibilities

  • Partner with cross-functional teams across product, analytics, and engineering to build and enhance a shopping assistant chatbot
  • Develop and refine prompt engineering strategies to elevate the quality of chatbot interactions
  • Implement LLM-based agents that connect with APIs, databases, and external tools through function calling
  • Safeguard chatbot reliability and prevent hallucinations by applying model evaluation techniques
  • Leverage A/B testing frameworks to measure and continuously improve chatbot ...

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