Hi,
I have read your post just now. I am Android developer since last 4 years and I am also leader of 35 employees.
Our latest UI Work:
https://www.freelancer.in/projects/Mobile-Phone-Android/Aditional-work-Existing-project.html
You want a help in making professional look and feel to the app. I am ready to work on this project as per your terms and conditions with good quality. You can check our completion ratio.
Thanks
Regards
Ebizz Infotech