Senior Python Developer - Freelance

the company is a trusted partner in digital commerce. The company helps leading brands modernize B2B solutions, marketplaces, and retail ecosystems. Since 2008, it has empowered businesses with cutting-edge technology, AI-powered personalization, and world-class engineering and design teams. A certified B Corporation®, the company is trusted by major brands including IKEA, VW, OLX, Delivery Hero, Żabka, Wolt, Careem, and Vinted.

How freelancing works at the company?

As a , you can choose what works well for you. You decide when, where, and how you work on projects and tasks.

We match you with work that fits your skills. Plus, you have access to various opportunities across different industries and companies. That means you will not only gain more experience, but also develop various skills.

But there's more. the company freelancers can benefit from full-time collaboration and really be a part of the team.

So, are you ready to make an impact? Join the company, and let's build beautiful software together.

Currently we are looking for a Senior Python Developer.

• Salary range:  up to 139 PLN/h

• Contract: Freelance B2B

• Start date: June 2026 

• Engagement: fulltime, long-term

• Location: Remote (based in European Union)

• Polish language is a must-have

Role description: Senior-leaning backend role with a data-heavy twist. The ideal candidate is a disciplined Python engineer who takes type safety and test quality seriously, is comfortable in the Azure cloud, and can reason about SQL performance in a data warehouse context. Pure Django API experience alone is insufficient.

Requirements

Must-have:

• Strong commercial experience with Python & Django backend development:

  • Python 3.13, with strict type annotations,

  • Django 6.x and Django.

• REST Framework:

  • Models, ORM, custom management commands, admin customization, migrations,

  • Comfortable with async-flavored Django - the app uses Gunicorn + Gevent workers.

• Data & SQL:

  • Experience with Snowflake,

  • Familiarity with PyPika or similar query builders,

  • Comfortable with Pandas and NumPy for data processing and report generation,

  • Solid SQL knowledge in general (subqueries, joins, aggregates, CTEs).

• Cloud / Infrastructure:

  • Azure ecosystem: Azure Storage Blob, Azure AD / MSAL (OAuth2 flows), Azure Batch,

  • Understanding of OpenTelemetry and distributed tracing,

  • Docker & Docker-compose for local development and CI.

• Quality & Tooling:

  • Strong discipline around testing - Pytest,

  • Experience with Ruff and pre-commit hooks .

• Soft Skills & Working Style:

  • Comfortable working in Polish,

  • Disciplined about ADR (Architecture Decision Records),

  • Strong code review culture,

  • Comfortable with legacy context.

Nice to have:

• Domain Knowledge: Retail analytics / BI domain.

• Familiarity with data warehouse concepts (fact tables, dimension tables, materialized aggregates).

• Experience integrating Azure AD SSO into Django apps + Experience building multi-tenant analytics APIs.

• Understanding query cost in Snowflake.

Benefits

In return, we offer:

• 100% remote, flexible work.

• Work with an experienced team of developers and continuous development of your hard and soft skills.

• Dev-friendly processes such as Continuous Integration, Continuous Delivery, Code Review and bug bashes.

• Long-term collaboration on challenging products (FinTech, B2B software, E-commerce and more).

Don't hesitate and apply right away!

At the company, we're committed to creating an inclusive environment for everyone. If you require any disability-related adaptations during the recruitment process, please let us know. We're here to help!