Good Day Carsten Blach,
Hello, I am a Professional 'Web developer and CMS' expert, With over 6 years of experience dealing with 'Web developer and CMS'. I've summarized your project description. I'm interested to hear more about the project.
Have a look over my SEO Process:-
---> Website Analysis
---> Keyword Research
---> On-page SEO
---> SEO work Report
Also, I can help make optimize Speed
Portfolio - you can check my skills and reviews here - https://www.freelancer.com/u/zahi9
Skills - Shopify, WordPress, Woocommerce, API, payment integration, PHP, Web Design, HTML,CSS
Sincerely yours,
Zahidul