We have extensive experience with Prestashop and have delivered 50+ Prestashop sites. Kindly check our portfolio under portfolio section of freelancer.com
Good Mornig
I have been develop for more 10 years developing on Prestashop for more 3 years.
I worked on a live auction site where I change almos any Prestashop behiviour but I have experence on themes changes, modules even develop external apps to work with the catalog
If you have any question please let me know
Regards