Bartosz Kaszubowski
Shareholder (former Lead Designer Full-stack Developer) at SentiOne
Pomeranian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top School
Top expert inCross-Platform Mobile Development with React Native
Bartosz Kaszubowski is a seasoned Full Stack Developer and UI/UX designer with 14 years of experience building polished web and mobile experiences from concept to production. As a long-term shareholder and former lead designer at SentiOne, he blends visual design, front-end engineering and backend work (Scala, Java/Groovy, Node) while shipping React and React Native products. He’s an active open-source contributor with notable work on Expo (expo-cli, snack, eas-cli) and core React/React Native projects, improving tooling, accessibility, dark mode and build reliability. Comfortable across TypeScript, JavaScript, Swift and Rust, he pairs pragmatic engineering with a designer’s attention to detail—often fixing subtle UX and platform-specific quirks that improve developer and user experience. Based in Pomeranian Voivodeship, Poland, he brings rare cross-discipline fluency: design-led thinking baked into full-stack implementation.
14 years of coding experience
11 years of employment as a software developer
Engineer's degree Computer Science, Engineer's degree Computer Science at Gdańsk Management College
English
Stackoverflow
347reputation
17kreached
4answers
3questions
Github Skills (57)
javascript10
ios10
mobile-development10
react-native10
website-development10
windows10
css10
expo10
open-source10
typescript10
ui-design10
android-development10
uid10
front-end-development10
tailwindcss10
Programming languages (15)
Github contributions (5)
react-native-community/directory
May 2020 - Jan 2023
A searchable and filterable directory of React Native libraries.
Role in this project:
Mobile Developer
Mobile DeveloperContributions:1010 reviews, 300 commits, 1303 PRs in 2 years 8 months
Contributions summary:Bartosz focused on improving the appearance and functionality of the React Native directory on the Windows platform. Their commits primarily involved fixing UI issues with the sort select appearance, displaying NPM package names in the library listing, and sorting platform tags alphabetically. They also made improvements to the image preview component. Furthermore, they contributed to UI tweaks across the header components, and added features like a recently added sort option and the display of package license information.
native-librariesreactreact-native-macosreact-nativejavascript
facebook/react-native-website
Oct 2018 - Jan 2023
The React Native website and docs
Role in this project:Front-end Developer
Front-end DeveloperContributions:1244 reviews, 249 commits, 1129 PRs in 4 years 3 months
Contributions summary:Bartosz primarily contributed to the React Native website and documentation. Their work focused on enhancing the user interface and improving the documentation's clarity. The contributions included adding styling to UI elements, fixing layout issues, and refactoring to improve the overall user experience. Additionally, the user updated various pages, fixed broken links, and incorporated the latest Docusaurus updates.
react-nativereactdocusaurus
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