Hi there,
However, to be honest with you, I can handle all design, front-end, and backend related works. Regarding SEO, You may need to use any SEO expert help or I can recommend you on request.
Let's share amendment list so that i can estimate the best quotation accordingly.
In term of past experience. Since 2009, I personally worked on near about 200+ Drupal website. Lot's of experience with Drupal 5 to latest Drupal 8x. I would be happy to share reference once you initiate the chat.
I see that your website is built on Drupal Ubercart. Big plus, I already on many e-commerce which based on the same platform.
Looking your next response to moving forward from here.
Regards,