Senior Software Engineer with 20+ years of experience in mobile, web, and systems development. M.Sc. in Computer Science from Eötvös Loránd University. Currently serving as a maintainer of @rnmapbox/maps, one of the most popular mapping libraries for React Native.
Freelance React Native Engineer at Margelo (Oct 2025 - present)
Working on Rive React Native v2 - a rewrite of the original runtime on top of Nitro Modules - and contributing to Nitro itself.
- Freelance React Native Engineer at Margelo - Rive React Native and Nitro Modules
- Mobile Developer (Aug 2024 - Aug 2025) - Zabit mobile app, built with Expo and React Native on a Supabase backend
- Vice President at Morgan Stanley - C++ developer working on proprietary middleware server for distributing market data (low latency/high throughput publish-subscribe system)
- Senior Software Engineer at various technology companies
- iOS Development experience with Objective-C/Swift
- Backend & Systems development with NodeJS/TypeScript (supabase), Ruby/Rails, Python
- Architecture & Infrastructure design for large-scale applications
- Cross-platform Development across mobile and desktop platforms
- Expert: C++, Framework Design, Large Projects, Legacy Code
- Advanced: Ruby/Rails, Python, TCP/IP Programming, React Native
- Intermediate: Objective-C/iOS, Java, JavaScript/HTML/CSS, Expo
- Specialized: Multi-platform Development, Supabase
- Infrastructure: CI/CD, Build Systems, Unit Testing, Git
- @rnmapbox/maps Maintainer: Leading React Native mapping solutions
- React Native Core: Multiple merged PRs including Swift Package Manager support, Android autolinking fixes, codegen improvements, and double-checked locking issue reproduction
- React Native Ecosystem: Bug reproductions, feature implementations, and community contributions (bug reports & PRs)
- Expo Contributions: Bug reproductions and improvements including race condition fix in expo updates and permission request dialog crash fix
- Rive React Native: Core contributor to the v2 runtime built on Nitro Modules, shipping as
@rive-app/react-native - Nitro Modules: Contributions to the native module framework
- Net-ssh Maintainer: Ruby SSH library with multiple contributions
- Rails: Core contributor with bugfixes and pull requests
- Other contributions: Google C++ Testing Framework, Selenium/WebDriver, Apple's GDB, Mesa3D
M.Sc., Computer Science - Eötvös Loránd University of Sciences (1995-2000)
- Portfolio: mfazekas.szemafor.com
- Open to collaboration on React Native, iOS, systems development projects, and @rnmapbox/maps
- Feel free to reach out for project discussions or contributions
Passionate about building robust, scalable solutions and contributing to the open-source community.