Sergey Biryukov is a WordPress Core Committer and backend engineer with 13+ years building and modernizing WordPress internals, plugins, and related CMS forks. Based in Rostov-on-Don, he contributes across Core, Polyglots, Support and Meta teams and co-founded the Russian WordPress community, bridging development and localization. His open-source work includes security fixes, comment/content handling improvements, and PHP-modernization across flagship repos like WordPress and ClassicPress. Sergey combines deep PHP/MySQL expertise with front-end skills (XHTML, CSS, JavaScript) and a history of optimizing large multisite and game-support systems. Beyond code, he has translated major texts and sustained long-term community support and documentation efforts, evidencing a focus on developer experience as well as end-user security. Collected experience from academia, product teams, and early game and CMS projects gives him a pragmatic, systems-oriented approach to evolving legacy platforms.
13 years of coding experience
13 years of employment as a software developer
Specialist, Applied Mathematics, Specialist, Applied Mathematics at Southern Federal University (former Rostov State University)
WordPress Develop, Git-ified. Synced from git://develop.git.wordpress.org/, including branches and tags! This repository is just a mirror of the WordPress subversion repository. Please include a link to a pre-existing ticket on https://core.trac.wordpress.org/ with every pull request.
Role in this project:
Back-end Developer
Contributions:263 reviews, 536 commits, 561 PRs in 1 year
Contributions summary:Sergey primarily contributed to the WordPress project by addressing deprecated PHP features and improving code style and maintainability within the core codebase. Their work involved explicit declaration of properties in the `Services_JSON` class, code formatting standardization, and updates to the Site Health tool. Additionally, the user also worked on fixing tests for features, date, and timezone-related issues, demonstrating expertise in the project's internals.
WordPress, Git-ified. This repository is just a mirror of the WordPress subversion repository. Please do not send pull requests. Submit pull requests to https://github.com/WordPress/wordpress-develop and patches to https://core.trac.wordpress.org/ instead.
Role in this project:
Back-end Developer
Contributions:102 commits, 73 PRs, 5 comments in 1 month
Contributions summary:Sergey primarily contributed to the WordPress core, specifically focusing on code modernization and documentation improvements. They refactored code to rename parameters using reserved keywords, ensuring compatibility with newer PHP versions. Furthermore, the user improved documentation across several core files, including better descriptions for block pattern properties and various filters, while also correcting typos. These changes involved modifying existing functionalities to improve code quality and provide better developer understanding.
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Sergey Biryukov - WordPress Core Committer at Yoast.com