Python Developer (f/m/x) @ Sii Polska

• At least 4 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 (50% on-site)

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.

• 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

Nice-to-have requirements

• Experience with Angular

Requirements:

• Python
• Pandas
• FastAPI
• Flask
• SQL
• PostgreSQL

Additionally:

• Medical care,
• Insurance,
• Sport cards,
• Language courses,
• Refferal programs,
• Welcome packs and other occasional gifts,
• Passion Sponsorship program,
• Regular integration events and trips,
• Contracts with the biggest brands,
• Diverse portfolio of clients,
• Flexible forms of employment,
• Internal training center,
• Mentoring program,
• Buddy Program & efficient onboarding process,
• Technology communities,
• Jubilee rewards,
• Profit sharing,
• Sport & hobby communities,
• Breakfast,
• drinks and fresh fruits in the office,
• Wide portfolio of technologies,
• Solid financial situation,
• Comfortable and well-equipped offices,
• MySii app,
• Invoice kiosk.