Android App Build & Design

I need an experienced Android app programmer to build and design two existing apps using my source code.

Requirements:
- Utilize existing source code
- Implement design changes:
- UI/UX overhaul
- Key improvements:
- Simplify navigation
- Improve visual appeal
- Enhance user engagement

Ideal Skills & Experience:
- Proficiency in Android development
- Strong UI/UX design skills
- Experience with source code integration and modification
- Ability to simplify navigation and enhance visual appeal