Lead Data Scientist
EPAM Systems • , , argentina, , , argentina • Posted July 10, 2026
About the Role
We are looking for a Lead Data Scientist with deep knowledge of Large Language Models (LLMs) and Python to create AI-driven chatbot solutions for targeted use cases.
The ideal candidate brings a solid foundation in Natural Language Processing (NLP) and Conversational AI, alongside hands‑on experience in hallucination mitigation, Responsible AI and compliance, and data analytics.
Responsibilities
- Team up with multidisciplinary groups spanning product, analytics, and engineering to design and improve a shopping assistant chatbot
- Shape and fine‑tune prompt engineering approaches to raise the quality of chatbot conversations
- Build LLM‑driven agents that interface with APIs, databases, and external services via function calling
- Protect chatbot dependability and reduce hallucinations by applying rigorous model evaluation methods
- Use A/B testing frameworks to assess and progressively elevate chatbot performa...