E-Wallet and Payment Gateway like payeer

We Planned to run E-Wallet system with the ability to make deosit and withdraw using a couple of Cryptocurrencies and also a couple of famous payment systems into their Fiat wallets or crypto wallets, customers will be able to transfer money, can exchange it, we also need to be able to give access to our website API, so clients will be able to pay using our payment system for an example please take a look at payeer website.
we need to run the website on a very secure platform,

we should be able to provide API or connection to be able to develop apps for android and IOS
we prefer to develop a project on Laravel Platform
All codes Should follow OOP coding standards and code comments.
Admin Panel separately will be provided by us
frontend theme is also will be provided by us
as you see on the sample website, the website should be multi-language, multi-theme design, we want to use the latest technologies on most secure way

Developer should have enough knowledge about Financial systems, Cryptocurrencies,E-Wallet, and banking systems.