facebook/react-native
Jun 2025 – Feb 2026
3 Months active
Languages Used
RubyKotlinTypeScriptC++
Technical Skills
Build SystemsCocoaPodsiOS DevelopmentAndroid DevelopmentFront End DevelopmentGradle
Tomasz Żelawski
PROFILE
Tomasz Żelawski
Tomasz Zelawski contributed to the facebook/react-native repository by focusing on build stability, developer experience, and cross-platform compatibility. Over three months, he addressed build process regressions and improved Gradle Configuration Cache compatibility, using Kotlin, TypeScript, and C++. His work included refining plist exclusion logic to prevent pod reinstall errors in iOS projects and updating Gradle plugin CLI detection to reduce build failures for Android. Tomasz also enhanced TypeScript typings for experimental styling properties and implemented HermesV1 configurability, allowing safer opt-out and reducing runtime errors. His contributions demonstrated depth in build systems and mobile development, improving reliability for React Native developers.
Overall Statistics
Feature vs Bugs
25%Features
Repository Contributions
6Total
Bugs
3
Commits
6
Features
1
Lines of code
195
Activity Months3
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336 peopleShared Repositories
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Adam ErnstMember
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Adrian StoneMember
Work History
February 2026
2 Commits
Feb 1, 2026February 2026 monthly summary for facebook/react-native: Delivered HermesV1 configurability and compatibility fixes, improving build reliability and runtime stability across Android and React Native projects. Implemented proper disablement of HermesV1, added fallbacks for missing inspector symbols when HermesV1 is disabled, and reinforced cross-version compatibility with Hermes prebuilt artifacts. These changes reduce build failures, enable safe opt-out of HermesV1, and set a foundation for future Hermes improvements.
2 Commits
Feb 1, 2026February 2026 monthly summary for facebook/react-native: Delivered HermesV1 configurability and compatibility fixes, improving build reliability and runtime stability across Android and React Native projects. Implemented proper disablement of HermesV1, added fallbacks for missing inspector symbols when HermesV1 is disabled, and reinforced cross-version compatibility with Hermes prebuilt artifacts. These changes reduce build failures, enable safe opt-out of HermesV1, and set a foundation for future Hermes improvements.
February 2026
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for facebook/react-native. Focused on build reliability improvements and TypeScript typing enhancements." Key outcomes include improved Gradle Configuration Cache compatibility in the React Native Gradle Plugin CLI by replacing Runtime.getRuntime().exec() with project.providers.exec(), addressing Gradle cache related build failures; expanded TypeScript typings to cover experimental background properties (experimental_backgroundSize, experimental_backgroundPosition, experimental_backgroundRepeat); validated changes through targeted CLI tests and CI workflows to ensure stable CLI detection and typings accuracy. Business value: fewer build errors, faster iteration, and better styling API typing coverage for developers.
December 2025
3 Commits • 1 Features
Dec 1, 2025December 2025 monthly summary for facebook/react-native. Focused on build reliability improvements and TypeScript typing enhancements." Key outcomes include improved Gradle Configuration Cache compatibility in the React Native Gradle Plugin CLI by replacing Runtime.getRuntime().exec() with project.providers.exec(), addressing Gradle cache related build failures; expanded TypeScript typings to cover experimental background properties (experimental_backgroundSize, experimental_backgroundPosition, experimental_backgroundRepeat); validated changes through targeted CLI tests and CI workflows to ensure stable CLI detection and typings accuracy. Business value: fewer build errors, faster iteration, and better styling API typing coverage for developers.
June 2025
1 Commits
Jun 1, 2025June 2025 monthly summary for facebook/react-native focused on build stability and developer experience. Delivered a regression fix in the React Native build process by excluding build/ and DerivedData/ directories from plist exclusion logic, preventing pod reinstall errors for users with relative build directories in Xcode. This change reduces CI flakiness and local build issues, enabling faster iteration for mobile apps using React Native.
1 Commits
Jun 1, 2025June 2025 monthly summary for facebook/react-native focused on build stability and developer experience. Delivered a regression fix in the React Native build process by excluding build/ and DerivedData/ directories from plist exclusion logic, preventing pod reinstall errors for users with relative build directories in Xcode. This change reduces CI flakiness and local build issues, enabling faster iteration for mobile apps using React Native.
June 2025
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Quality Metrics
Correctness96.6%
Maintainability86.6%
Architecture86.6%
Performance86.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++KotlinRubyTypeScript
Technical Skills
Android DevelopmentBuild SystemsC++CocoaPodsFront End DevelopmentGradleKotlinReact NativeTypeScriptiOS Developmentmobile development
Repositories Contributed To
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