5 years of experience in Android. - Half-year in DLNA/UPNP development (NDK, java) and Godot engine
I worked on big projects with difficult backend and native core
For example:
1 - (auto-steering and navigation for tractor) - https://play.google.com/store/apps/details?id=com.kmware.efarmer
2 - https://play.google.com/store/apps/details?id=mobi.efarmer.device.toolkit
And more projects have NDA and built for B2B(for the big factories in the world)
Programming languages: C/C++, Java, python, gdscript