About this role

Python Developer (f/m/x) Sii Polska Daily tasks: - Designing, developing, and maintaining data ingestion and transformation pipelines - Building and evolving the data model with a strong focus on data quality, consistency and reliability - Developing and maintaining Python backend services and REST APIs that expose pricing and vehicle-related data - Integrating internal and external systems through APIs and event-driven data flows - Writing clean, well-documented and well-tested code while ensuring production stability through monitoring and data quality checks - Collaborating closely with Product Owners, Architects, Scrum Masters and Developers to deliver scalable business solutions Musts: Python, Pandas, FastAPI, Flask, SQL, PostgreSQL, Apache Airflow At least 3 years of professional experience as a Python Developer with a focus on backend and data development Strong proficiency in Python, including experience with data-processing libraries such as Pandas Experience with frameworks such as FastAPI or Flask Solid SQL skills and hands-on experience with relational databases, particularly PostgreSQL Experience building and orchestrating data pipelines, ideally using Airflow Familiarity with Git, code reviews, testing, and CI/CD practices Fluent English and Polish communication skills, with experience working in an international environment Willingness to work from the Warsaw office 2–3 days per week Nice-to-have requirements Experience with Angular We are looking for a Python Developer to join our international team developing a strategic platform that powers vehicle pricing and recommendation processes across the organization.

The solution collects and processes large volumes of internal and external data, transforms it into a unified data model, and delivers pricing insights through modern APIs. As a Python Developer, you will play a key role in building scalable data pipelines, backend services, and integrations while collaborating closely with product owners, architects, and software engineers in an Agile environment.

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