Hey,
Hope you doing very well , I have more than 12+ years of experience and ready to start the development after checking out the project details. I am specialized in web development & Security ( Wordpress, PHP, Javascript & other open sources php frameworks), web design( HTML5, CSS3, Bootstrap,Google Apis), Graphics Design, ERP, Product Development, Databases and having much more skills. I am working with my satisfied clients from last 12+ years.
I'll fix all issues you mention in your project requirements ,Mobile Design Improvement, improve Site Speed & Site Update tasks.
Waiting for your reply.
Bundle of Thanks.