Yes, I can help you in all your mentioned responsibilities like Maintain existing content on the site, Create new image banners and new pages, Add new products, Maintain SEO, Ensure Website is running at optimal speed.
As, I do have Expertise with WordPress , PHP , Customisation , API Integration , Plugin. And, I also have designing skills like Website designing , Graphic designing , HTML , CSS , HTML 5 , MySQL with 8+ years of experience.
With the WordPress, I have completed a lot of projects where I have done theme customizations and theme developments from Scratch, Extension Development and lot of customization and optimizations done with WordPress Platform.
So, Please let me know your convenient time for further discussion.
Regards
Mithu