WooCommerce - change in the plugin for importing data from the warehouse

We are looking for a developer to make changes to a custom plugin used to import data of products located in a wholesaler.

We use two XML files for import:

1) containing product information - name, description, brand, attributes, ean, etc.

2) containing prices and stock

The key by which to do the mapping is the unique EAN number.

Problems:

1) There are about 50k different products in total in the warehouse (XML) (each variant is one product), the plugin stops importing after 10 minutes due to timeout (PHP configuration) and you have to restart it or you have to manually split one large XML file into several smaller ones and import one by one.

2) The plugin does not import brand names. Brands are supported by the Perfect Brands WooCommerce plugin, but we may abandon it if another, simpler solution is suggested.

3) Some products have variants, such as capacity. When one product appears in the wholesaler (XML) in multiple variants, we import multiple products, which multiplies the number of products in our store.