James Ide
Co-founder & CTO at Expo
California, United States
Summary
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Rockstar🎓
Top School
Top expert inCross-Platform Mobile Development with React Native
James Ide is the co-founder and CTO of Expo with 13 years of engineering experience building developer tools and cross-platform mobile experiences that let teams ship native apps from JavaScript. Based in California, he combines deep iOS and JavaScript expertise—contributing to React Native, Metro, Jest and TypeScript defs—with hands-on work across both front-end UX and backend systems like the Expo push notification SDK. At Expo he leads platform and cloud service development (YC S16), focusing on build, deploy, OTA updates and notifications while maintaining active open-source stewardship. His background includes performance and infrastructure work at Facebook and research into program synthesis, which informs a pragmatic taste for automation and developer ergonomics. Notably, his commits touch critical pieces of the React Native toolchain, showing influence on the ecosystem beyond his startup.
13 years of coding experience
5 years of employment as a software developer
B.S., Electrical Engineering and Computer Sciences, B.S., Electrical Engineering and Computer Sciences at University of California, Berkeley
Stackoverflow
20,488reputation
1.8mreached
169answers
59questions
react-native
top-1%
ios
top-1%
slice
top-5%
java
top-5%
python
top-5%
javascript
top-5%
Github Skills (64)
babel610
objective-c10
javascript10
ios10
typesc10
npm10
mobile-development10
react-native10
component-design10
apidoc10
imageio10
image10
ui-components10
testing10
css10
Programming languages (19)
Github contributions (5)
ide/react-native-button
Mar 2015 - Mar 2020
A button for React apps
Role in this project:
Front-end Developer
Front-end DeveloperContributions:2 releases, 2 reviews, 31 commits in 5 years
Contributions summary:James primarily contributed to the development of a React Native button component. They added the initial component, refactored it for Node-style module resolution, implemented support for multiple children and string concatenation, and added a `testID` prop. The user also addressed minor issues, such as fixing a typo in the prop types and updated the styling of the component.
react
expo/xde
Aug 2015 - Mar 2018
The Expo Development Environment
Role in this project:Front-end Developer
Front-end DeveloperContributions:14 releases, 126 commits, 7 PRs in 2 years 7 months
Contributions summary:James primarily focused on front-end development tasks within the Expo Development Environment. Their contributions involved adjusting CSS, adding placeholders, and modifying UI elements. They also updated button labels and added platform selection buttons for iOS/Android URLs. Moreover, they were responsible for updating the app to support React 0.14 and refactoring code to upgrade tooling with Gulp 4.x and a new Babel config, all of which indicate a focus on improving the user interface and development workflow.
react-nativedevelopment-environment
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