UI/UX Design for Art Marketplace Website

I'm building a website to sell downloadable art reference packs (photography, pose packs, guides, etc.), similar to marketplaces like Gumroad or ArtStation, but with a focus on artists and sketching. The site will eventually integrate with a companion iOS app.

I'm seeking an experienced UI/UX designer to produce high-fidelity website designs and supporting assets that can be handed off to a developer for build. The project includes:

- Homepage
- Product pages
- User dashboard
- Vendor Dashboard
- Store/Marketplace
- Static Pages: About, FAQ, Contact
- Checkout and payment flow

The desired style is modern and minimalistic. I have concept for a brand but currently need assistance in creating brand guidelines and color schemes.

Ideal skills and experience:
- Experience designing e-commerce / digital marketplace websites
- Skilled in Figma (preferred) or Adobe XD
- Understanding of mobile-first responsive design
- Experience with digital product sales UX a plus

Design Deliverables:
- Style Guide / Brand Kit (colors, fonts, UI elements, button styles)
- Wireframes for all key pages
- High-Fidelity Mockups in Figma (desktop + mobile)
- Clickable Prototype in Figma for stakeholder review
- Assets Export (icons, images, UI elements ready for dev)

What to Include in Your Proposal:
- Portfolio of similar projects
- Estimated timeline to deliver all designs
- Fixed price or hourly rate
- Number of revisions included