Magento B2B eCommerce

I'm looking for an experienced Magento (open source) developer with experience developing online stores for a mobile application.

Modules needed:
1. Signup/login using email & OTP
2. User profile
3. Products
4. Cart & Checkout (no need for online payments)
5. Offers & discounts
6. Orders history
7. Invoicing

I need the developer to prepare these modules for Rest API usage.

Regards