Minimalist Modern Mobile App UI/UX Design

I need a talented UI/UX designer to enhance the visual appeal of my mobile app on both iOS and Android platforms. The design should be modern and minimalist.

Key Requirements:
- Create a clean, modern, and minimalist design
- Improve the app's visual appeal without complicating navigation
- Design for both iOS and Android platforms
- Collaborate on design iterations based on feedback

Ideal Skills:
- Proven experience in mobile app UI/UX design
- Strong portfolio showcasing modern and minimalist designs
- Proficiency in design tools like Sketch, Figma, or Adobe XD
- Experience with both iOS and Android design guidelines
- Excellent communication skills for collaboration

Please provide a portfolio with similar work.