Create a highload of backend on Laravel (microservice)

Hello!

We are engaged in a highly loaded electronic card service cardpr.com.
We have a team of different levels and specialties.
In the work we use for the vue/Nuxt frontend, for the Laravel backend.
The service works on API with Apple, Google and various CRM systems.
The priority is the quality of the code and the stability of the system.

We are currently working on a new administrative interface for the system
and were looking for a backend developer for the project.
Experience with API systems with other services is required.
It will be a plus if you have experience in building automated beckoning testing.

If you are interested in this work, please specify at the beginning of the response your city, the number of hours that you are ready to do to the new project per week and drop the link to your repository.