Nextcloud Expert for Branding Customization

I'm seeking a Nextcloud expert to help with branding and UI design.

Key Tasks:
- Overall UI design as per attached file
- Custom Group settings modifications, specifically:
- Permissions and access levels
- Storage quota adjustments
- Replace "Nextcloud" with my brand name

Ideal Skills and Experience:
- Proven Nextcloud customization experience
- Familiarity with Custom Group settings in Nextcloud
- Attention to detail and ability to follow specific requirements

Please provide examples of similar work done.