Marc Rousavy
Founder & CEO at Margelo
Vienna, Austria
Summary
🤩
Rockstar🎓
Top SchoolMarc Rousavy is an Austrian founder, CEO and hands-on software engineer with nine years of experience building high-end mobile apps and performance-critical native backends. He runs Margelo, a Vienna-based app studio serving clients like Facebook, Coinbase, Shopify and Red Bull, and also leads an angel-holding company while freelancing across notable platforms. Deeply embedded in the React Native ecosystem, Marc has made significant iOS contributions to flagship open-source projects such as react-native-navigation, react-native-reanimated and react-native-mmkv, and helped improve Shopify’s react-native-skia and other high-profile libraries. He combines low-level native expertise (Objective-C++, JSI, C/C++) with polished UI work—shipping interactive graphs, blurhash image tooling and high-performance crypto bindings. A regular conference speaker, Marc pairs entrepreneurial leadership with active open-source stewardship and a knack for turning tricky native problems into reliable developer-facing solutions.
9 years of coding experience
3 years of employment as a software developer
Engineer's degree Information Technology, Engineer's degree Information Technology at Technologisches Gewerbemuseum
English, German
Stackoverflow
1,015reputation
43kreached
12answers
43questions
Github Skills (49)
uiimage10
objective-c10
javascript10
c-language10
ios10
mobile-development10
react-native10
animation10
typescript10
navigationbar10
gesture10
navigation-drawer10
jscript10
obj10
android10
Programming languages (21)
Github contributions (5)
mrousavy/react-native-mmkv
Feb 2021 - Jan 2023
⚡️ The fastest key/value storage for React Native. ~30x faster than AsyncStorage!
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:78 releases, 57 reviews, 505 commits in 1 year 11 months
Contributions summary:Marc primarily contributed to the implementation of the native iOS module for the React Native MMKV library. They refactored and installed a C++ wrapper for the library, which included setting up the necessary JSI bindings and integrating with the React Native bridge. Furthermore, the user added essential functionalities such as `getBoolean`, `getString`, `getNumber`, `delete`, and `getAllKeys`. Lastly, the user worked on ensuring the library's compatibility with React Native 0.71 and refactored the iOS native module to utilize the current versions of Objective-C++ and JSI.
fastestmmapiospersistentstorage
margelo/react-native-graph
Apr 2022 - Sep 2022
📈 Beautiful, high-performance Graphs and Charts for React Native built with Skia
Role in this project:Mobile Developer
Mobile DeveloperContributions:4 releases, 18 reviews, 56 commits in 4 months
Contributions summary:Marc primarily focused on implementing and refining UI components for a React Native graph and chart library. Their contributions include setting up the React Native Reanimated plugin, configuring gesture handling, and creating interactive elements like toggles. The user also made improvements to the visual presentation of the graph, including adding a fade-in effect and controlling selection dot styling. They introduced data display and incorporated haptic feedback for better user interaction.
skiawalletstockioscharts
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