Mariusz Felisiak
Senior Django Python Developer at Divio
Toruń, Kuyavian-Pomeranian Voivodeship, Poland
Summary
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Top expert inDjango Web Development and E-commerce Platform
Mariusz Felisiak is a Senior Django/Python developer with 12 years of experience and a deep commitment to the Django ecosystem, serving on multiple core teams (Mergers, Releasers, Security, Operations, Triage & Review) and acting as release manager for Django 3.1, 4.0, and 4.2. He combines production engineering roles—most recently at Divio and CaseFleet—with sustained open-source stewardship, contributing bug fixes and compatibility updates across flagship projects like CPython, Django REST Framework, NumPy and django-filter. His work shows a pragmatic focus on long-term maintainability: upgrading libraries for newer Python/Django versions, closing security issues (including an XSS fix), and improving test coverage. Based in Toruń, Poland, Mariusz brings both hands-on backend craftsmanship (notably Oracle and SQLite backend fixes) and cross-project coordination skills honed as a former Django Fellow.
12 years of coding experience
13 years of employment as a software developer
Master's degree Computer Science, Master's degree Computer Science at Nicolaus Copernicus University
English, Polish
Stackoverflow
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Github Skills (37)
api-rest10
debug10
sqlite10
postgresql10
back-end-development10
translation10
api-design10
python10
django10
restful-api10
testing10
oracle-database10
databases10
django-rest10
data-serialization10
Programming languages (13)
Github contributions (5)
django/django
Feb 2021 - Jan 2023
The Web framework for perfectionists with deadlines.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5422 reviews, 668 commits, 6945 PRs in 2 years
Contributions summary:Mariusz primarily focused on fixing bugs and improving the Oracle database backend for the Django framework. The commits indicate the user implemented fixes to address database crashes and issues related to JSONField and other database features on Oracle. They also contributed to enhancing the functionality and performance of Oracle-specific features within the Django framework, such as database collation support.
pythondjango-frameworkappsdjangoframework
django-request/django-request
Jan 2014 - Jan 2023
django-request is a statistics module for django. It stores requests in a database for admins to see, it can also be used to get statistics on who is online etc.
Role in this project:Backend Developer
Backend DeveloperContributions:4 reviews, 173 commits, 209 PRs in 9 years 1 month
Contributions summary:Mariusz's contributions primarily focus on enhancing the django-request module, a Django-based statistics tool. They implemented compatibility fixes and updated the code to support newer Django versions (1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1). Furthermore, the user addressed deprecation warnings and refactored the code to ensure adherence to the latest Django standards, improving the module's functionality and maintainability. The user also addressed an XSS vulnerability.
statisticspythondjango-rest-frameworkdjangodatabase
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