I've read your details very carefully and am sure I can finish your project successfully.
I have a lot of experience about xamarin android.
I had finished a lot of e-commerce apps such as grocery.
You can see myMais
"Hi, Hope you are doing well! Thanks for sharing your project requirement with us. It will be our great pleasure to work on your project. I have checked your requirement, yes we can do it, because we already work on siMais