At least 3 years of hands-on experience working with LLMs, NLP, or foundation models in a commercial environment, Strong understanding of transformer-based architectures and modern NLP techniques, Proficiency in Python and experience with popular LLM and NLP frameworks and libraries, Experience with fine-tuning, serving, and monitoring large language models in production, Good command of English at B2/C1 level, Fluent Polish required, Residing in Poland required