Szymon Cofalik
Principal Engineer at CKEditor
Warsaw, Masovian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolSzymon Cofalik is a Principal Engineer based in Warsaw with 11 years of experience building and maintaining rich web editing experiences, currently leading engineering efforts at CKEditor. He progressed through senior and front-end roles at CKSource and eSky, combining deep JavaScript expertise with a focus on real-time collaboration and editor UX. An active contributor to the widely used CKEditor 4 and 5 projects, he has hands-on experience refactoring test suites and improving selection handling and editor features to boost reliability and usability. Comfortable navigating both code and QA, he blends test automation discipline with feature-driven front-end development. Szymon’s background in computer science and a decade-plus of shipping production editing tooling give him a practical edge in architecting robust, user-facing web components.
11 years of coding experience
16 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at The Silesian University of Technology
Polish, English
Stackoverflow
1,150reputation
39kreached
19answers
3questions
ckeditor
top-5%
Github Skills (20)
javascript10
ckeditor10
front-end-development10
test-automation10
maintenance9
unit-testing9
rich-text-editor8
wysiwyg8
user-interface8
html-editor8
apim7
model-view-controller7
api7
html6
react6
Programming languages (5)
Github contributions (5)
ckeditor/ckeditor5
Nov 2015 - Jan 2023
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:578 reviews, 2160 commits, 237 PRs in 7 years 3 months
Contributions summary:Szymon primarily focused on improving and maintaining the codebase of the rich text editor framework, CKEditor 5. Their contributions centered around enhancing the functionality and usability of the editor by implementing features such as improved documentation, and more accurate selection handling. Key contributions included fixing bugs and refactoring code to use more efficient helper functions. Their work demonstrates proficiency in JavaScript and a focus on improving the editing experience.
rich-textwysiwyg-editorlexicalrichtexttinymce
ckeditor/ckeditor4
Jun 2015 - Sep 2015
The best enterprise-grade WYSIWYG editor. Fully customizable with countless features and plugins.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:68 commits, 10 pushes in 3 months
Contributions summary:Szymon primarily contributed to the refactoring of automated tests for the Image plugin. The commits demonstrate a focus on updating and improving existing tests, modifying test cases, and ensuring the reliability of the testing framework. They modified existing test cases and added new ones, demonstrating proficiency in testing methodologies within the context of a rich text editor. The contributions involve writing and modifying JavaScript tests to validate the functionality of the Image plugin.
wysiwyg-editorbbcodetinymcequilljavascript
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