Bartlomiej Kowalczyk
Head Of Engineering at OLX
Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolBartlomiej Kowalczyk is a Head of Engineering with 12 years of hands-on web development and leadership experience, currently scaling OLX’s blue-collar jobs marketplace across multiple European and Central Asian markets. He blends a strong JavaScript and PHP engineering pedigree—evidenced by contributions to high-profile projects like the Wikia/app repository—with a proven track record of leading distributed, cross-ocean teams. Known for building safe, enthusiastic environments, he balances people-first management with technical fluency across AWS, serverless, Go, React and Kotlin. Fluent in English and comfortable as a first-language communicator at work, he also teaches and mentors, having run front-end courses and led engineering teams at Fandom and other companies. Practical, growth-oriented, and experienced in both legacy platforms (MediaWiki/PHP) and modern stacks, he thrives on turning complex product needs into reliable, user-focused solutions.
12 years of coding experience
9 years of employment as a software developer
Profil mat-fiz-inf, Profil mat-fiz-inf at Tadeusz Kosciuszki High-School in JarocinBachelor of Science (BS), Electronics and Telecommunications, Bachelor of Science (BS), Electronics and Telecommunications at Poznan University of Technology
English, Polish
Github Skills (3)
php10
api-design9
javascript8
Programming languages (4)
Github contributions (5)
Wikia/app
Jul 2013 - Oct 2020
Wikia Application Code
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 1163 commits, 295 PRs in 7 years 3 months
Contributions summary:Bartlomiej's commits primarily involve changes to PHP code within the `wikia/app` repository. Their work focuses on modifying existing code related to link suggestions and API functionality, specifically within the `extensions/wikia/LinkSuggest` and `extensions/wikia/MercuryApi` directories. The user also worked on a JS file related to a create new wiki flow.
wikiphpwikiamediawiki
Wikia/mobile-wiki
Oct 2014 - Sep 2020
Wiki pages on mobile web
Contributions:10 reviews, 2516 commits, 150 PRs in 6 years
wikimobile-webwiki-pages
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