Senior Data Engineer

We are looking for a Senior AI / Data Engineer / Data Scientist to join an international team building AI-powered solutions for large-scale web content processing, attribute extraction, and market expansion. This is a hands-on role combining data engineering, machine learning, NLP, and applied AI, where you'll design scalable data pipelines, fine-tune ML models, and contribute to the development of AI research agents operating across multiple countries and languages.

• Design, build, and optimize Spark pipelines for large-scale web content ingestion and processing.
• Develop data processing and analysis workflows using Python (Polars and/or Pandas).
• Fine-tune lightweight machine learning models for attribute extraction.
• Prepare training datasets and ensure high data quality.
• Evaluate model performance and improve ML pipelines end-to-end.
• Apply NLP techniques to extract, classify, and reason over information from web content.
• Expand internal AI research agents to new geographic markets and adapt them to local data conditions.
• Develop evidence collection and reasoning logic for new place-related attributes.
• Evaluate ML systems across different locales, languages, and data sources.
• Improve pipeline orchestration and optimize multi-source data ingestion processes.
• Collaborate with cross-functional international teams to deliver scalable AI solutions.

• 5+ years of commercial experience in Data Engineering, Machine Learning, AI, or Data Science (7+ years preferred).
• Strong Python programming skills, including Polars and/or Pandas.
• Commercial experience with Spark (Scala is a strong plus).
• Hands-on experience building and optimizing large-scale data pipelines.
• Experience with NLP and fine-tuning lightweight machine learning models.
• Good understanding of data quality, model evaluation, and ML performance metrics.
• Familiarity with agent frameworks, especially LangGraph.
• Experience adapting AI/ML solutions across multiple countries, languages, or data domains.
• Experience with pipeline orchestration and large-scale data processing.
• Strong analytical mindset, ownership, and problem-solving skills.
• Comfortable working in a dynamic, international environment.

• B2B contract
• Up to 200 PLN/h net + VAT
• 2-week onboarding in Malmö, Sweden fully covered by the client