Cross-Platform E-Commerce App Design

I’m creating a new e-commerce mobile experience that must feel perfectly at home on both iOS and Android. I already have the brand assets; what I need now is a thoughtful UI/UX designer who can translate that identity into a seamless shopping journey—from first launch through checkout—while respecting each platform’s native conventions.

Here’s the flow I’d like you to handle:

• Map the full user journey, then produce low-fidelity wireframes for review
• Transform approved wireframes into high-fidelity, developer-ready screens in Figma, Sketch, or Adobe XD
• Build a clickable prototype that demonstrates core interactions and transitions
• Deliver a concise style guide (colours, typography, components) plus neatly organised exportable assets for Flutter or React Native hand-off

Acceptance criteria
• Screens align with Apple Human Interface Guidelines and Material You principles
• Visual and interaction consistency across platforms
• Prototype passes a short usability test I’ll run with five shoppers

If you have recent cross-platform e-commerce work, please include a link so I can gauge style compatibility. I’m ready to start right away and will provide quick, clear feedback at each milestone.