Python Developer (f/m/x)

Sii Poland; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking a Python Developer to join our international team, building a strategic pricing platform. You will design data pipelines, backend services, and REST APIs while collaborating with product owners, architects, and software engineers in an Agile environment.

The role focuses on scalable data processing, data quality, and integration with external systems. Warsaw office 2–3 days a week, with English and Polish communication in an international setting.

Qualifications

• 4+ years of professional Python backend and data development experience.
• Strong Python skills with Pandas data-processing experience.
• Experience with FastAPI or Flask frameworks.
• Solid SQL skills; PostgreSQL experience.
• Experience building data pipelines, ideally with Airflow.
• Git, code reviews, testing, and CI/CD practices.
• Fluent English and Polish; experience in an international environment.
• Willingness to work from the Warsaw office 2–3 days per week (50% on-site).
• Nice to have Angular experience.

Responsibilities

• Designing, developing, and maintaining data ingestion and transformation pipelines.
• Building and evolving the data model with a 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.

Skills

Python

Pandas

FastAPI/Flask

PostgreSQL

Airflow

Git

CI/CD

English

Polish

SQL

Tools

Airflow

PostgreSQL

Job description

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.

Your 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

Requirements

• 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)

Nice to have

• Experience with Angular

Job no.

JOB-MTVHA

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care