Clean Website and App Mockup Designer, UI expert

I'm on the hunt for a skilled graphic designer who specializes in modern and clean designs. The main purpose of this task is to create a website and app mockup (according to our brandbook) to effectively showcase our Pet sitting services for the Australian market. I'm looking for a professional who can:

• Incorporate our brand's color scheme throughout the design, ensuring a cohesive and attractive look.
• Create an intuitive navigation structure to keep user interaction smooth and simple.
• Emphasize the design on our portfolio, with a clear, user-friendly display of our products and services.
• Work out all pages needed to link pet sitters with pet owners. You can see this site as a booking.com or uber.com for pet sitters and owners. The site owner takes a 10% commission on transactions

Our current website that has to be re-done is: https://rovingsitters.com.au/

We want the new website and app to be intuitive, but quick to use, so on the home-page it should immediately give the possibility to find a sitter or owner. The new design and UI should have conversion as highest priority.

The ideal freelancer for this task will have experience in creating clean, modern designs and a superb understanding of good UI/UX practices. Understanding branding principles and having a great eye for detail is essential.

Feel free to ask for more information. We're looking for a professional that won't change rates or ask for more milestones after accepting the job. We have a limited budget.