Data Scientist (LLM)

Chat Assistant is used by over 10 million travelers, it’s evolving from a traditional conversational bot into an advanced, agentic AI. It’s not just about answering FAQs - this assistant already handles end-to-end transactions like rebookings and refunds today, offering a truly seamless travel support experience. The team’s mission is to create the most intelligent, intuitive conversational experience in the travel industry via the move to Agentic AI. Your responsibilities: • Craft and fine-tune advanced LLM prompts to drive high-performance conversational experiences in the Chat Assistant. • Use a data-driven approach to identify limitations in current conversational models and generate effective solutions for challenges such as user engagement, contextual understanding, and content moderation. • Design reusable frameworks that encapsulate innovative functionalities and can be adapted across various assistant use cases. • Collaborate closely with engineering teams to align GenAI strategies with backend enhancements, contributing to architectural optimization and improved task performance. • Prototype, deploy and maintain new LLM or agentic AI based strategies to support emerging features and expand the assistant’s capabilities. • Continuously evolve the LHG Chat Assistant architecture with a focus on deepening the assistant’s natural language understanding and response relevance, integrating agentic AI principles to enable more adaptive, goal-oriented interactions in our redesigned system. • Build LLM-backed transactional flows. • Transition towards agentic AI, orchestrate hybrid solution with AI + deterministic logic. • Implement and maintain function calling to backend systems or APIs. • Automated testing for all components of AI solutions (prompt, flows, function calls, etc.). Our requirements: • At least 3 years of commercial experience in Data Science or Machine Learning, • Expertise in designing, testing, and optimizing solutions for large language models (e.g., ChatGPT, GPT-4). • Proficiency in Python and at least one AI/data- platform (e.g. CognigyAI, databricks) • Hands-on expertise with AI/NLP platforms and performance evaluation (A/B testing, error analysis). • Solid grasp of current AI/ML research, with a focus on best practices for GenAI and emerging agentic AI concepts. • Strong collaborator in agile, cross-functional teams, with excellent technical communication. • Awareness of ethical AI practices, including bias mitigation and data privacy. • Ability to translate complex concepts into accessible language for non-technical stakeholders. • A systematic approach to identifying issues in existing setup and constructing targeted solutions, including the ability to troubleshoot and optimize model behavior under different conversational scenarios. • Very good command of English language, • Proactive attitude and the ability to work as a team player, • The ability to think beyond the current scope of the project, • Experience actively participating in a Scrum team by bringing in new solutions, • Willingness to travel once per quarter, • Willingness to upskill on your own initiative and deriving further insights from data, • Willingness to come to our office in Gdańsk two days a week or relocate to Trójmiasto. What do we offer? • An international working environment, atmosphere that stimulates development, • Individual career path, • Lufthansa Group membership benefits, • Salary in the range of:• Standard position 11 000 - 16 000 zł gross (contract of employment) • Senior position 14 000 - 21 000 zł gross (contract of employment) • Workplace adjusted to employee's needs, • Support for your passion for sports within the local activity group and co-financing Multisport cards, • Life insurance, • Private medical care for employees and their family members. • Holiday funds, • Sharing the costs of holidays for kids. • Modern office in Oliwa – great location and comfortable workspace. • Atmosphere – small teams, high independence, real impact on the project.