Karol Kołodziej
Frontend Developer at Black Label
Krakow, Lesser Poland Voivodeship
Summary
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Top SchoolKarol Kołodziej is a Frontend Developer based in Krakow with six years of professional experience building and maintaining complex TypeScript, Angular, and React applications. At Black Label he drives full lifecycle feature delivery, testing (Jasmine/Jest/Karma, Cypress), code reviews and architectural decisions while mentoring peers and engaging directly with clients and pre-sales. He contributes to the well-known Highcharts open-source charting library, focusing on map visualizations, refactoring and integration work that improves the framework’s maintainability. With a background in civil engineering, Karol brings a structured, documentation-minded approach to front-end architecture and cross-team collaboration.
6 years of coding experience
3 years of employment as a software developer
Master's degree Civil Engineering, Master's degree Civil Engineering at Politechnika Krakowska im. Tadeusza Kościuszki
Polish, English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (7)
javascript10
front-end-development10
refactoring8
refactor8
typescripts6
typescript6
typescript-types6
Programming languages (4)
Github contributions (5)
highcharts/highcharts
Apr 2020 - Jan 2023
Highcharts JS, the JavaScript charting framework
Role in this project:
Front-end Developer
Front-end DeveloperContributions:1408 reviews, 815 commits, 611 PRs in 2 years 9 months
Contributions summary:Karol's commits primarily focus on modifying and integrating functionality within the Highcharts library, specifically in the context of a JavaScript charting framework. The contributions involve merging branches, renaming directories, modifying JavaScript code and related test files, and adding sample code. Their work appears to center on the enhancement and refactoring of the framework's code related to map visualizations and overall code simplification.
chartinghighchartsjavascriptjs
highcharts/dashboards-dist
Sep 2023 - Oct 2025
Official shim repo for releases of Highcharts Dashboards
Contributions:10 PRs, 4 pushes, 17 branches in 2 years 2 months
highcharts
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