EPAM is a leading general provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

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 performance
- Apply Responsible AI and compliance principles to guarantee ethical practices and regulatory alignment
- Perform exploratory data analysis (EDA) to uncover insights and translate them into structured requirements for the data engineering team
- Guide cloud engineering teams on the infrastructure needs required for AI‑powered chatbot solutions

Requirements
- At least 3 years of professional relevant experience in data science or applied AI roles
- Expertise in Large Language Models, including

📌 Senior Data Scientist (Colombia)
🏢 EPAM Systems
📍 Colombia