Need a Native iOS App Developer

I need iOS developer to help me.

Code question of video posting application using Firebase, no application creation required.

This time, I'm developing iPhone application for the photo sharing service.

I'm trying to develop an app that can be liked by posting videos like TIKTOK.

I would like to know the code at that time.

The UI of the framework has already been created using Swift in Xcode, and you only have to answer the questions of the code in some places.

(Probably the actual code is only a few dozen lines each)

We would appreciate it if you could do it while discussing whether the code is working.

What I want to ask are

・ How should I store this app in Firebase when I make it?

・ And how to get the stored data

・ How to play a video in full screen on the background of the screen like TiKToK

...etc

I would like to consult and decide, but since it is only a code question, I would like someone as soon as possible.

If you have any questions, please feel free to contact me.

I am looking forward to your application!