I don't believe that anyone would give you a loan or fund your project.You will have to make some money and hire a programmer.
He is a programmer himself.If you read the thread carefully,he already has the apps done using React Native.
You need and engineer working for you? Pay him, or sweet talk them into working for free but its hard
The engineer who falls for the development with the "sweet talks" isn't an engineer.They would either code for free if the idea has the potential or they want to experiment new stuff and learn it while working on your project.