Blockchain Website & App Expert require - for PayPal & Stripe Similar platform with an Exchange option

Blockchain Website & App Expert require for Payment Exchange and own Payment Gateway - Platform Require
Like Stripe and PayPal + with multiple options for Accepting payments and Sending payouts globally.

Website & App Design
Responsive Website & App Development (Flutter or React Native)
Modern Design, Extra Smooth Transitions & 3d Look
Money Exchange.
Wallet - Account, Transactions, Card, etc.
Payment Gateway. (API, SDK & Plugins)

Panels/Dashboard
Full Website & App Control - Admin Panel & Staff Panel

Website, App, Admin & APIs, SDK, Plugins Complete Documentation
and 6 month complete Support

-- Users can credit payments to their website account (from any source)
-- Users can withdraw payments to any required accounts (banks, cards, etc.)
-- The website will provide its own Payment gateway so Users can add their Apps and websites.
-- Users can get their own Card facility

Type at the start of your proposal " Custom new Payment Platform "

I don't want any pre-funded accounts (I need the best way to do this)
- I need this as in multi-vendor eCommerce Functionality
Where the buyer buys the product and pays for it.
Payment comes to the product merchant account. and the Merchant can withdraw it to any account or wallet where he wants.
Here on this platform, the same concept - just replace the word merchant with the user and withdraw with receive.

Attach your similar work along with your proposal.

Don't submit a proposal.
This project is for long available term expert team. (on monthly basis for upgrades)
-- Without reading details.
-- (1500$ - 1800$) If your budget is much over from this.