Technical Lead — Data Science (f/m/x)

Sii is hiring a Technical Lead for Data Science projects, working with data science teams and clients across multiple Polish cities. The role involves leading data science engagements and working with platforms like Microsoft Fabric, Palantir Foundry, Databricks, and major cloud providers.

• At least 6 years of data science experience with models shipped to production
• Minimum 2 years leading or mentoring data scientists
• Proficient hands-on Python skills with pandas, NumPy, scikit-learn, and XGBoost
• Strong statistical and machine learning foundations including experimental design and validation
• Familiarity with at least one cloud/data platform and its data science components (Azure, AWS, GCP, Snowflake, Databricks, or Palantir)
• Experience leading delivery in client-facing or consulting contexts including scoping and risk management
• Strong communication skills for technical and non-technical audiences
• Fluent in English and Polish
• Residing in Poland

• Own the technical direction of data science engagements: solution design, modeling approach, validation strategy, and delivery quality
• Lead and mentor a team of data scientists including code and methodology reviews and career development
• Stay hands-on by prototyping approaches and contributing production-grade Python code
• Translate client business problems into scoped data science workstreams and challenge unnecessary modeling
• Set and enforce engineering standards such as reproducibility, experiment tracking, testing, and documentation
• Guide platform decisions and delivery across cloud and data ecosystems including Microsoft Fabric, Palantir Foundry, Databricks, Snowflake, and Azure/AWS/GCP
• Collaborate with AI Architects, data engineers, and client stakeholders to align technical decisions with business outcomes
• Represent the team in client meetings by presenting results, defending methodology, and managing expectations

Wyrażam zgodę na przetwarzanie moich danych osobowych zamieszczonych w niniejszym CV przez Sii sp. z o.o. z siedzibą przy Al. Niepodległości 69, 02-626 Warszawa („Sii”) dla celów procesów rekrutacyjnych prowadzonych przez Sii.