Sylius Store Mailchimp Integration

I need an expert to integrate my Sylius store with Mailchimp for newsletter sign-ups. The store is fully operational, and I have a Mailchimp account ready for use. The integration should only capture email addresses during the sign-up process.

Ideal Skills:
- Proficient in Sylius and Mailchimp
- Experience with e-commerce and email marketing integrations
- Understanding of GDPR and email marketing regulations

Maybe also include a checkbox on the site for Newsletter.