Diverse Website Development - 4 Unique Sites -- 2

I'm in need of a skilled web developer to create four distinct websites for me. Each will have a different primary purpose: one will be e-commerce, another informational, and the third a portfolio site. The fourth purpose isn't specified but can be discussed.

Key Requirements:
- E-commerce site: This will need to be user-friendly, with a seamless shopping experience.
- Informational site: The design should facilitate easy navigation and comprehension of content.
- Portfolio site: This should creatively showcase a collection of works, with a modern touch.
- A fourth site: The purpose of this site is flexible and can be discussed.

Design Styles:
- The e-commerce and informational sites should adopt a modern and sleek design.
- The portfolio site should be creative and artistic, standing out from the rest.

Specific Features:
- All sites should cater for user accounts. This will require a secure authentication system and a smooth user interface.

Ideal Skills:
- Proficiency in e-commerce platforms and web development languages.
- Experience with modern, sleek designs and creative, artistic layouts.
- Ability to implement secure user account features.

I'm looking for a freelancer with a strong portfolio who can deliver high-quality websites that meet these specifications.