Hi,
I don't have a long history here, but I have good expertise in Android development and only positive feedback from my clients (I can give you a link to my UpWork profile on request - I have more history there).
Please browse my profile to make an opinion about me. Also, I have more offline experience from past employers, before coming into freelancing.
I can prove my skills by providing you a basic prototype/sample project, if you want.
And I am a very friendly guy - I think this matters quite a lot.
What do you say?