Lead Data Scientist

Description

Summary: We are seeking a Lead Data Scientist specializing in LLMs and Python to create AI-driven chatbot solutions, focusing on NLP, Conversational AI, and Responsible AI. Highlights: 1. Lead data science efforts for AI-driven chatbot solutions 2. Shape prompt engineering and build LLM-driven agents 3. Ensure ethical operation and regulatory conformity with Responsible AI 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, along with 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 Natural Language Processing (NLP) and Conversational AI creation * Confident English communication skills at B2 level or above, in both writing and speech **Nice to have** * Practical background in A/B testing and experimentation, working closely alongside analytics teams * Skill in defining and executing a testing strategy grounded in key performance indicators specific to chatbot solutions * Proficiency in exploratory data analysis (EDA) for drawing valuable insights from sizable datasets * Aptitude for producing clear, structured data specifications for the data engineering team * Familiarity with cloud services, whether through direct hands\-on work or by outlining infrastructure requirements for cloud engineering teams **We offer** * International projects with top brands * Work with global teams of highly skilled, diverse peers * Healthcare benefits * Employee financial programs * Paid time off and sick leave * Upskilling, reskilling and certification courses * Unlimited access to the LinkedIn Learning library and 22,000\+ courses * Global career opportunities * Volunteer and community involvement opportunities * EPAM Employee Groups * Award\-winning culture recognized by Glassdoor, Newsweek and LinkedIn