Hi,
I can do this for you as easy as possible. I have created a similar framework to create backend for apps. So I have studied firebase well. Do let me know.
I have 7 years of experience with MS in software engineering.
Regards,
Deepak Mishra
Dear sir
Thank you for your posting of your requirement
I have rich experience of android app development
Please see my review
Then you can see my ability.
If you give me your project detail now,I'll make your app asap
Please contact with me and let's start project.