Fintech understanding

Job ID: 31542816

Budget: $10 – $30 USD

hi ,
i want to understand how the money transfer apps work
and payment getaway

so many companies provide payment getaway, i want to understand how they are working.

are they integrated with all local banks "witch not logic" or how they provide such services


after researching in the local market i found so many payment getaway that any website can integrate and start the payment but this companies take high rate per transaction.
what i want to understand how these companies works and how they can provide such services, since i want to provide such service by myself to directly myself.

is there any type of integration with local banks or integration with master/credit card

i want you to guild me how I understand how this companies works , and how I can start my company for the same business,

also i found some application that provide money transfer , how i can achieve that.

after that we can think about the system to handle that