Mateusz Bernacik

Javascript Developer at Black Label

Krakow, Lesser Poland Voivodeship
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Summary

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Rockstar
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Mateusz Bernacik is a JavaScript developer based in Krakow with six years of hands-on experience building and refining interactive front-end experiences. Currently at Black Label since 2021, he focuses on shipping polished UI features and solving complex client-side bugs. He is an active contributor to the widely used Highcharts project, improving chart usability and fixing nuanced issues in JavaScript and TypeScript across multiple chart types. With a BASc in Computer Science from Uniwersytet Ekonomiczny w Krakowie, he combines formal training with practical open-source work to prioritize clear visuals and reliable interactions. Colleagues describe him as detail-oriented and adept at turning tricky UI edge cases into maintainable solutions.
code6 years of coding experience
bookBachelor of Applied Science - BASc, Computer Science, Bachelor of Applied Science - BASc, Computer Science at Uniwersytet Ekonomiczny w Krakowie
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Github Skills (10)

data-visualizations10
typescript10
data-visualization10
data-visualisation10
user-interface10
typescripts10
javascript10
highcharts10
front-end-development10
typescript-types10

Programming languages (5)

TypeScriptJavaJavaScriptVueHTML

Github contributions (5)

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highcharts/highcharts

Jul 2021 - Jan 2023

Highcharts JS, the JavaScript charting framework
Role in this project:
userFront-end Developer
Contributions:108 reviews, 92 commits, 59 PRs in 1 year 6 months
Contributions summary:Mateusz primarily contributed to fixing bugs and improving the user interface of the Highcharts library. This included removing unnecessary API properties, correcting chart configurations, and addressing issues related to data labels, tooltips, and annotations. The changes involved modifications to JavaScript and TypeScript files, as well as demo files, showcasing a focus on the visual and interactive aspects of the charting framework. The contributions span across various chart types, indicating a broad involvement in improving the library's overall usability.
chartshighchartschartchartingjavascript
bm64/pp5-voucherstore-3511

Jan 2021 - Jan 2021

Contributions:10 PRs, 18 pushes, 20 branches in 6 days
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Mateusz Bernacik - Javascript Developer at Black Label