Multi-vendor online store - WordPress

I would love some assistance with developing a shop page for my multi vendor e-commerce website. I have setup the store and will capture or upload products for each vendor but a user friendly shop page with the ability to filter by category, price, tags, product search, and vendor.

Ensure that the site performance is optimal and reliable (might include liaising with the service provider)

SEO for the site (product listing on Google, etc.)