API payment Integration of existing flutter app

We are currently looking for a laravel developer to integrate another payment api in our app:
You job will consist of the following :
1. Integrate the api with it's services
2. Test it allong with us

Info:
The admin and backend of the app is based on the laravel framework
The front end is based on flutter.
The api comporte of 3 services
- Money transfert
- Bill payment
- Top up.
Here the api : https://apidocs.smobilpay.com/s3papi/index.html
The work will start after the selection on Wednesday.

Thank you