Kacper Rożniata
Senior React Native Developer
Poland
Summary
🤩
Rockstar🎓
Top SchoolKacper Rożniata is a Senior React Native Developer with four years of focused mobile engineering experience, currently shaping cross-platform apps at Callstack. He specializes in iOS improvements within the React Native ecosystem, contributing fixes and features to high-profile projects like facebook/react-native and callstack/react-native-pager-view that improved dark mode, animations, and Fabric support. His background blends front-end experience from Xentivo with a computer science and econometrics education from Uniwersytet Warszawski, giving him a pragmatic, data-aware approach to UI and performance issues. Notably, he’s hands-on with debugging and stability work—preventing crashes and refining developer tooling—so his impact is as much about maintainability as new features.
4 years of coding experience
5 years of employment as a software developer
Computer Science and Econometrics, Computer Science and Econometrics at Uniwersytet Warszawski
English, Polish
Github Skills (9)
uipageviewcontroller10
objective-c10
swift10
ios10
mobile-development10
react-native10
app-framework8
ui-design6
android3
Programming languages (5)
Github contributions (5)
callstack/react-native-pager-view
Sep 2022 - Jan 2023
React Native wrapper for the Android ViewPager and iOS UIPageViewController.
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:67 reviews, 26 commits, 31 PRs in 4 months
Contributions summary:Kacper primarily contributed to the iOS implementation of the React Native pager view library. Their work involved dropping support for certain transition styles, adding fabric support, addressing build issues, and fixing several issues related to animations and functionality. The user also removed the showPageIndicator feature and resolved a height issue, ensuring a smoother user experience. Their contributions demonstrate a focus on maintaining and enhancing the core functionality and stability of the iOS component.
reactviewpagerreact-nativeandroidandroid-viewpager
facebook/react-native
Oct 2022 - Mar 2025
A framework for building native applications using React
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:2 reviews, 10 PRs, 15 comments in 2 years 5 months
Contributions summary:Kacper primarily focused on fixing and improving the iOS-specific aspects of the React Native framework. Their contributions included fixing dark mode issues in the RNTester application, preventing crashes in the AlertExample, and enhancing the rendering of the RCTRedBoxExtraData for debugging. They added support for missing text content types and addressed animation issues in the Switch component.
reactnative-applicationsmobile-developmentreact-nativeandroid
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