Hello,
I have experience in from scratch development of Android application,
including ones with sophisticated functionality and UI design, you can view one of my work at:
http://www.amazon.com/Denis-Manyukhin-Touch-Light-Trial/dp/B00RC4ODV4/ref=sr_1_36?s=mobile-apps&ie=UTF8&qid=1444143269&sr=1-36&keywords=touch+light
Regarding you question, can you please be more specific, Activity without Android navigation bar at the bottom can be achieved with full screen mode, did you try it ?
Please also note that freelancers can't message you until you write them first or until you hire them
Looking forward to hear from you,
Best regards,
Denis