Bartosz Dziewoński
Senior Software Engineer at Wikimedia Foundation
Lesser Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolBartosz Dziewoński is a Senior Software Engineer with 15 years of experience, currently shaping editing tools at the Wikimedia Foundation and contributing deeply to MediaWiki core. As a MediaWiki core developer he has several hundred merged commits and exercises +2 review rights, driving backend improvements around redirects, templates, section editing and API behavior for one of the web’s most visible open-source platforms. He is proficient in JavaScript and front-end technologies, knowledgeable in PHP, and frequently bridges front-end UX and backend logic to improve editor workflows like VisualEditor and WikiEditor. His early Google Summer of Code work on separating skins from core foreshadowed an ongoing focus on modular, maintainable architecture. Based in Lesser Poland, he combines production-scale open-source stewardship with pragmatic performance and compatibility fixes that benefit millions of daily users.
15 years of coding experience
The 5th High School in Kraków, PolandAGH University
English, Polish
Github Skills (7)
php10
api10
apidoc10
wikitext9
database-management9
mysql8
performance-optimization8
Programming languages (16)
Github contributions (5)
wikimedia/mediawiki
Aug 2012 - Jan 2023
🌻 The collaborative editing software that runs Wikipedia. Mirror from https://gerrit.wikimedia.org/g/mediawiki/core. See https://mediawiki.org/wiki/Developer_access for contributing.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1986 commits in 10 years 7 months
Contributions summary:Bartosz primarily contributed to the MediaWiki software's backend functionality, focusing on improving the handling of redirect and template-related features. They fixed bugs, updated logic related to section editing, and optimized code to enhance system performance and compatibility with new functionalities, such as multi-dimensional or associative arrays. Additionally, the user's contributions involved improvements in the core system, involving a wide array of internal changes to API functionality.
collaborative-editingmediawikiphpwikiwikipedia
MatmaRex/php-src
Jun 2016 - Oct 2021
Contributions:7 pushes, 1 branch in 5 years 5 months
phpinterpreter
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