Piotrek Koszuliński
Director Of Engineering at CKEditor
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolPiotrek Koszuliński is a seasoned engineering leader with 15 years of experience driving web and rich-text editing technologies, currently serving as Director of Engineering at CKSource in Warsaw. He has led CKEditor 5 from its inception as lead JavaScript developer, architect, and project manager to become one of the world's most popular modular rich-text editors, while also stewarding community and customer relationships with enterprises like IBM and Microsoft. Piotrek blends hands-on front-end craftsmanship—contributing UI features, editor plugins, and migration work across MDN and CKEditor repositories—with product vision, developer advocacy, and team building for a 30+ engineer organization. He’s an invited W3C Editing Task Force expert and routinely translates complex browser editing challenges into practical APIs and roadmap decisions. Colleagues know him for pragmatic architectural choices, mentoring, and a knack for turning open-source contributions into enterprise-grade, real-time collaboration features.
15 years of coding experience
15 years of employment as a software developer
LO3Bachelor's degree, Computer Science, Bachelor's degree, Computer Science at Wrocław University of Science and Technology
English, Polish
Stackoverflow
21,949reputation
1.9mreached
530answers
2questions
css
top-5%
ckeditor
top-1%
drupal
top-5%
contenteditable
top-1%
jquery
top-5%
javascript
top-1%
Github Skills (30)
contenteditable10
javascript10
text-editor10
widgets10
css10
code-standards10
html-editor10
ui-design10
ckeditor10
editor10
uid10
wysiwyg10
front-end-development10
html10
coding-style10
Programming languages (9)
Github contributions (5)
ckeditor/ckeditor5
Dec 2014 - Dec 2022
Powerful rich text editor framework with a modular architecture, modern integrations, and features like collaborative editing.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:24 releases, 314 reviews, 11546 commits in 8 years 1 month
Contributions summary:Piotrek's commits primarily involve modifications to the UI, including the addition of a "source editing" feature for HTML snippets. The commits demonstrate a focus on integrating new features with the existing UI and the configuration of the editor's toolbar. The changes touch on components of the content styling and layout of the editor's interface.
rich-textwysiwyg-editorlexicalrichtexttinymce
ckeditor/ckeditor4
Jan 2012 - Jan 2016
The best enterprise-grade WYSIWYG editor. Fully customizable with countless features and plugins.
Role in this project:Front-end Developer
Front-end DeveloperContributions:3174 commits, 37 PRs, 313 pushes in 4 years 1 month
Contributions summary:Piotrek removed JSCS comments, updated a .jscsrc configuration file, and fixed various code style issues in the ckeditor4 repository. The majority of the changes involved refactoring code and applying code style improvements to existing files across different components and modules. The code edits included changes in dialogs, editing tools, and the image plugin.
wysiwyg-editorbbcodetinymcequilljavascript
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