Senior Python Engineer

Senior Python Engineer Wrocław, Poland | Onsite Employment contract Up to 50,000 PLN gross/month We are looking for a Senior Python Engineer to join a team building data tooling, libraries and production pipelines used in a high-scale, technically demanding environment. You will work closely with large historical, time-series and event-based datasets, helping improve how data is processed, validated, monitored and made available to technical teams. What you will work on Building and maintaining production-grade Python tools, libraries and data pipelines Working with large-scale historical, time-series and event-based datasets Improving data quality, validation, observability and monitoring Optimising data-processing workflows and pipeline performance Writing SQL queries and working with analytical databases and data platforms Collaborating with engineers and technical users to improve internal data workflows Solving practical problems around data reliability, scale and performance What we are looking for min. 7 years of commercial experience with Python as your primary programming language Strong hands-on experience with Pandas, NumPy, Polars, Dask or similar Python data tooling Experience working with time-series, event-driven or large historical datasets Strong SQL skills Hands-on experience with analytical databases or data platforms such as ClickHouse, Snowflake, BigQuery, Redshift, Databricks, Druid or similar Experience building production data pipelines, internal tools or reusable Python components A practical approach to data quality, debugging, monitoring and performance optimisation Good English communication skills (C1) What is offered Employment contract Salary up to 50,000 PLN gross per month Onsite work in Wrocław A chance to work on technically challenging, data-heavy problems Real influence on tools and workflows used by experienced technical teams International working environment and collaboration with strong engineering profiles If you enjoy Python, large-scale data and building reliable tools that make other teams more effective, we would be happy to speak with you!