Marketplace App Design

I need a designer to create a phone app prototype for a marketplace concept. The design should convey my vision, even if it doesn't function.

Key Requirements:
- Interactive prototype showcasing a marketplace layout.
- Map feature displaying real-time product availability.
- Intuitive navigation and user-friendly interface.

Ideal Skills:
- Experience in mobile app design.
- Proficiency in design tools (e.g., Figma, Sketch).
- Strong UI/UX design background.
- Ability to translate ideas into visual concepts.

Please include samples of previous app design work.