Developers create the systems for publishing web pages. These systems could be a server and file structure or a content management system.  They may also set up the basic template to be used with each page.  

Any issues that are introduced at the page template level are for the developer to address.  Some examples of the kind of issues that developers might address include:

• Page level landmarks
• Site level navigation and search
• Magnification
• Form fields
• ARIA tags