How do I showcase ruby skills for Backend Developer in Mind

Hi guys,

It may be out of topic but got to ask and get some help.

If We are going for Ruby Developer role (specifically for the Backend type), how do we showcase our skills ?
Is it by building a site with these features (but not limited to) ??

• Basic CRUD
• Ajax implementation
• Use populars Gems (Devise, CarrierWave, Stripe, Voteable, Bootstrap-Sass)
• Have has_many - belongs_to relationship
• model valiation
• unit testing
• integration testing
• patial