Hello,
How are you?
I am "Sunil", Expert App developer and I am willing to work on this project.
-I will build an app for all the phases as you need.
-Yes,I will work for "Back end Services", "Core Applications", "Sample Plug-Ins" as you have mentioned.
-Kindly share the details and I assure you to provide best results for it.
With Warm Regards
Sunil