Signal Android UI Customization

I'm looking for an experienced Android developer to customize the Signal app's user interface.

Key aspects to customize include:
- Color scheme
- Button styles
- Layout design

I'm open to suggestions for the color scheme and brand guidelines.

Ideal Skills and Experience:
- Proficiency in Android app development
- Experience with Signal or similar messaging apps
- Strong UI/UX design skills
- Familiarity with Android design principles and customization

Please provide a portfolio showcasing relevant work.