Coders have very exacting standards. They are highly rational, good at following standards and are cooperative once they know why it is they are doing something.

My tip to get Coders working with you is to create bite sized checklists of no more than 7 things. Work with the key habits you want them to get and then move on to the next set in order of priority

Here is an example of one of the first ones you can start with:

Coder Checklist
Get the SEO guy to buy you a coffee when you
-are thinking of deleting pages
-are changing URLs
-are removing links
-are adding new sections to the site

PS – give your SEO person a coffee budget – there will be a big ROI guaranteed