Looking for some advice on how to go about producing a bespoke E-Commerce platform.

Background

Digital Agency looking to niche in the ecom side of things. Experience with WordPress and WooCommerce, looking to develop our own in order to achieve more customisation. We have faced difficulties using the WooCommerce ecosystem for certain integration builds so looking to expand the tech.

What Tech?

Looking for suggestions where we can achieve small scale builds but also have the ability to scale up to integrations with external APIs for larger businesses - B2B.

Initial Thoughts

Initially, my go to would be Laravel, as coming from a predominantly PHP focused background and knowing Laravel to some degree it makes sense. However, now seeing the sheer amount of JavaScript libraries there are I am stuck on decisions.

Any feedback or if anyone could shed a light on their own experiences would be much appreciated.

Thanks

UPDATE
I think we are going to start using Laravel to achieve the E-Commerce build. After doing some research and taking on board your guys' feedback. It seems appropriate to use this framework.

Cheers all