In my free time, I write mobile applications and publish them. I am the author of Audio Profiles for Android which has several thousands active users. I am also working in another couple of apps using React Native that will go public in 2019.
Talking in public is great when you have something to share. In 2018 I talked about The dark side of Background tasks in React Native at React Alicante 2018 and at React Native Camp in Kiev. I also talked about Paper 2.0: Material Design at React Native EU in Wrocław.
In 2017 I talked about one of my personal projects React Native Case Study: From zero to a super hero app at React Alicante and about Testing React & Redux applications with the "new" Jest at Front End Con in Warsaw.
Both my work and personal time involve open-source. I created several libraries such as react-native-sync-adapter and material-preferences. I also like to create useful examples such as react-native-testing-example. Furthermore I continuously contribute into libraries I often use like react-native-paper, jest and react-native.
I usually write on Medium. Some articles I am proud of are listed in the official documentation of Jest. They are about unit testing React Native apps: part 1 and part 2. I also wrote about the process of creating a native module React Native: The Android Sync Adapter as well as Android Drawer & StatusBar done right for React Native and React Native: Handling language changes on Android the right way. Finally, I also wrote the official announcement for the React Native Paper 1.0 release.