ML Engineer — NLP (Polish)

About the company: KIEFER is building Greece's integrated AI ecosystem. From renewable energy infrastructure and AI systems to robotics and enterprise applications, we connect the technologies that power Europe's intelligent future. Founded in 2014, KIEFER has delivered 600MW+ of energy projects and is now developing sovereign AI infrastructure, enterprise AI products and physical AI systems for Greece and Southeast Europe. About the role We are looking for an ML Engineer to improve how our language models work for Polish users. You will measure quality on real product tasks, build Polish-language data and evaluations, and improve models where the results show gaps. Your work will help us understand which Polish-language use cases are ready for launch. The methods you build should also be useful as we expand to other languages. What you will do - Define priority Polish-language use cases and quality targets with Product and go-to-market teams. - Measure current model quality in Polish and investigate errors in language use, terminology, and user tasks. - Build Polish-language datasets and evaluations, using native-speaker review where needed. - Improve model quality through better ... Click Apply to read the full job description.