Jacek Woźniak
Full Stack Engineer at Bethink
Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolJacek Woźniak is a seasoned Full Stack Engineer with 15 years of experience building and operating highly scalable web platforms, currently driving engineering at Bethink. He has led cross-team migrations and infrastructure modernizations—including a multi-year MediaWiki upgrade, Kubernetes migration, and an auth migration to Ory Kratos—while delivering measurable cost savings and stability improvements. At Fandom and Google he combined hands-on backend, frontend and DevOps work, from performance-tuning JavaScript UIs to designing large-scale data pipelines and machine learning workflows. A pragmatic engineering leader and recruiter, he’s repeatedly taken ownership of critical systems, reduced vendor spend by over 20%, and introduced agile and observability practices. His open-source contributions include hardening authentication and logging in the widely used Wikia codebase, demonstrating attention to operational detail beyond feature work.
15 years of coding experience
23 years of employment as a software developer
Master of Science (M.Sc.) in Computer Science Intelligent Decision Support Systems, Master of Science (M.Sc.) in Computer Science Intelligent Decision Support Systems at Poznan University of Technology
English, German, Polish
Stackoverflow
1reputation
14reached
0answers
1question
Github Skills (7)
php10
logging10
user-authentication9
authentication9
debugging9
mediawiki8
python6
Programming languages (11)
Github contributions (5)
Wikia/app
Feb 2012 - Oct 2020
Wikia Application Code
Role in this project:
Back-end Developer
Back-end DeveloperContributions:14 reviews, 2036 commits, 381 PRs in 8 years 9 months
Contributions summary:Jacek's contributions center around improving the authentication and logging mechanisms within the Wikia application's request context. They addressed log pollution issues by refining the logging method, ensuring it only logs relevant information and correctly handles fallback scenarios when multiple authentication methods are used. The user also implemented logging for password-related calls and Helios-related operations, increasing the visibility of these core functions. Additionally, they fixed indentation issues and made a small correction in relation to test case failures.
wikiphpwikiamediawiki
themech/Machine-Learning-Coursera-Tensorflow
Jan 2017 - Apr 2018
Contributions:40 commits, 32 pushes, 1 branch in 1 year 3 months
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