I'm an Pro Android Developer, Open Source Practitioner and Founder of a bootstrapped Mobile App Studio.
I've been working full-time on Android since 2010. I bootstrapped my company by developing Android apps for clients. I've also authored 6 open-source libraries for Android of which 3 are very popular.
I have a fair amount of experience with the NDK. I ported the JH Labs image processing library to C++ in 2012. We are using the ported codebase for the iOS and WP version of an image processing application. One code base to rule them all.