Senior Data Scientist

We are seeking a **Senior Data Scientist** with expertise in Large Language Models (LLMs) and Python to develop innovative AI-powered chatbot solutions tailored for specialized use cases.**Responsibilities**- Collaborate with cross-functional teams, including product, analytics, and engineering, to design and implement shopping assistant chatbot solutions- Define prompt engineering strategies to enhance chatbot conversational quality and user interaction- Build and deploy LLM-based agents capable of seamless integration with external tools, APIs, and databases via function calling- Ensure the accuracy and reliability of chatbot responses through robust evaluation and hallucination prevention methodologies- Develop data-driven strategies for A/B testing and optimization in collaboration with analytics teams- Conduct exploratory data analysis (EDA) to uncover insights and support the creation of structured data requirements for engineering teams- Partner with cloud engineering teams to guide infrastructure development for scalable AI solutions**Requirements**:- 3+ years of working experience in AI and ML development, preferably with a focus on conversational agents- Expertise in LLMs, leveraging OpenAI APIs within Azure ecosystems- Solid skills in Python for AI workflow integration and optimization- Knowledge of hallucination prevention techniques and Responsible AI & compliance best practices- Background in Natural Language Processing (NLP) and Conversational AI design- Familiarity with A/B testing frameworks, experimentation strategies, and performance metrics for AI systems- Capability to define data and testing requirements while collaborating with cross-functional teams- Understanding of cloud services, with the ability to specify infrastructure needs or provide hands-on support**Nice to have**- Experience in exploratory data analysis (EDA) to enhance chatbot accuracy- Proficiency in creating technical requirements for data engineering teams- Familiarity with cloud engineering workflows and infrastructure specifications**Technologies**- LLMs: OpenAI APIs on Azure- Languages: Python- Key Tools & Methods: Function Calling, Prompt Engineering, Hallucination Prevention, Responsible AI & Compliance, A/B Testing, Data Analysis**We offer**- Career plan and real growth opportunities- Unlimited access to LinkedIn learning solutions- International Mobility Plan within 25 countries- Constant training, mentoring, online corporate courses, eLearning and more- English classes with a certified teacher- Support for employee’s initiatives (Algorithms club, toastmasters, agile club and more)- Enjoyable working environment (Gaming room, napping area, amenities, events, sport teams and more)- Flexible work schedule and dress code- Collaborate in a multicultural environment and share best practices from around the globe- Hired directly by EPAM & 100% under payroll- Law benefits (IMSS, INFONAVIT, 25% vacation bonus)- Major medical expenses insurance: Life, Major medical expenses with dental & visual coverage (for the employee and direct family members)- 13 % employee savings fund, capped to the law limit- Grocery coupons- 30 days December bonus- Employee Stock Purchase Plan- 12 vacations days plus 4 floating days- Official Mexican holidays, plus 5 extra holidays (Maundry Thursday and Friday, November 2nd, December 24th & 31st)- Monthly non-taxable amount for the electricity and internet billsEPAM is a leading global 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.