Hein Rutjes

Author of the ARION running app. A comprehensive app with extensive Google/Apple maps usage and background Bluetooth communication and geo-tracking. Some notable achievements: - Custom native bluetooth communication and geo-tracking (background) - 60 fps animations using web-gl - various native contributions (react-native-map, react-native-tts, gl-react-native, react-native-device-info, react-native-background-timer) - Comprehensive text-to-speech system - Advanced animations & interactions - Author of react-native-bundle-visualiser - Author of react-native-magic-move

I'm a full-time JavaScript developer, which means it is my language of choice and I tend to use it for nearly everything these days. Everything from developing react-native apps (my main focus), React-js websites, Node-js automations and Firebase Lambda Functions. I've authored many closed source libraries and occasional have time for open-source libs. I believe in automating as much as possible and properly documenting libs/apps as much as possible. I have become a true believer of unit tests and prettier-js. Some notable open source projects I've authored: - AutoLayout.js (Apple's auto-layout for JavaScript) - Firestorter (firestore/react bridge using Mob-X) - Kiwi.js (mathematical constraint solver) - react-tag-cloud (animatable word clouds for React/DOM) - react-native-bundle-visualiser (see what is increasing your react-native bundle size) - node-web-bluetooth (interactive device picker and web-bluetooth API for node.js) - famous-flex (layouts & animations)

Similar to Java, I only tend to write Objective-C when I need to write/fix native code for React-native. In the past I have authored the Flow-Xpert App, written entirely in Objective-C and C++. Some notable experiences: - Flow-Xpert Native App - Extended react-native-maps with snapshot & gradient polylines support - Various native contributions to react-native-device-info - Fixes and enhancements to react-native-tts - Wrote new API for react-native-background-timer - I'm quite knowledgable about X-code

I'm not a Java developer but I know my way around it when I need to (I find it a horrible language to be honest, yay for Kotlin ;). I only code in Java when I need to write/fix Native code for react-native. Some notable work: - Custom native Background Bluetooth stack for react-native (Arion Run app) - Fixed some complex crashes in gl-react-native due to multi-threading issues - Added snapshot support for react-native-map - Various native contributions to react-native-device-info - Fixes and enhancements to react-native-tts and more..

I was a hardcore C++ dev for a large part of my carreer. I don't do any C or C++ anymore these days, but I could if needed. I've worked on various industrial automation products (WinCE & desktop) written in C++, as lead/core developer and software architect. I designed and built everything from hot-swappable redundancy solutions, to custom UI's using GDI+. These products were built using Visual Studio (6 - 2008), using STL and MFC.

I've authored various libraries and apps for famo.us, amongst: TalentDater, Firstrade, famous-flex, famous-map (google-maps integration), and various smaller projects and libraries. Famo.us is new, it's bouncy, it's fun, and it's conquering the world. I believe in this technology as a great solution for writing cross-platform apps, and I'd like to contribute my part.