Yes I can Do,
I will add required features for different user roles (subscriber, author, editor etc.) into exiting membership plugin.
Please initiate the chat and share existing plugin details so I will start work on required user roles creation.
I have 8+ years working experience in Wordpress CMS, Plugin development & Customization, WooCommerce subscriber, Membership Pro, S2 member plugin, Active membership plugin, PHP/MySQL, HTML/CSS and others.
I assure you for the best services.
Regards,
Dev