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 idóneo 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 performance
- Embed Responsible AI and compliance principles to ensure ethical operation and regulatory conformity
- Carry out exploratory data analysis (EDA)



to surface insights and convert them into well‑defined requirements for the data engineering team
- Advise cloud engineering teams on the infrastructure requirements essential to AI‑powered chatbot deployments

Requirements
- No less than 5 years of hands‑on professional experience in data science or applied AI positions
- At least 1 year of experience guiding and managing development teams
- Strong command of Large Language Models, including practical work with OpenAI APIs on Azure
- Advanced Python programming abilities for integrating, orchestrating, and refining AI workflows
- Track record of building AI agents that use function calling to engage with external tools and databases
- Solid grasp of hallucination prevention methods to preserve chatbot precision and dependability
- Firm understanding of Responsible AI and compliance best practices, along with ethical AI standards
- Demonstrated experience in N

📌 Lead Data Scientist (Argentina)
🏢 EPAM Systems
📍 Argentina