Skilled Magento Developer Required

We are looking for a developer to complete some tasks on our website. We are operating on Magento 2 platform and have 2 stores in two geographical locations on this site which require a skilled developer to ensure they operate correctly.

Outstanding tasks include (but are not limited to)

Ensuring current custom script imports products correctly from wholesaler.
Adding "show out of stock" Button and ensuring site loads only in stock products otherwise.
Ensuring one of our shipping APIs is correctly routed to endpoint.
Removing a third store created in error which currently is unable to be removed.
Connecting several domain names to lead domain.
Connecting Google Analytics.
Changing checkout API payment processor token for one of the stores.
Ensuring Geolocation is operating correctly and pop up relating to it is functional.
Ensuring product filter works correctly with product loading functionality.

Website optimisation including.
Running broken link checker.
Running google page speed insights and correcting errors.