I think you can give Sylius a try sylius.com/ .
It's based on Symfony.
I'd like to see a comparison between Sylius and Magento. I was a Magento 1.9 developer myself, but haven't tried Sylius.
Sorry for the bad English.
I've not done so many e-commerce with custom backend so I didn't know about Sylius, it looks nice! I'm more a Laravel guy though haha
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