Working with 3rd party developers

Hello Community, hope you can help…can you tell me what access I need to give to a 3rd party developer, to help me with the CMS. I’m new to Webflow, I have a CMS Plan, and have granted him Editor access. I have asked him to change a few things in the CMS (Add new custom fields, remove some old ones) is Editor access all he needs, he says he cannot make the changes, he needs to access the back end? Thanks

Webflow has a team plan for that. Allows team member access to the designer.

Thanks Jeff S…appreciate your reply