Customize app on AppBuilder

I need a wordpress expert who has immense experience in App Builder for designing the app, both Android (.apk) and iOS (.ipa) versions of an app customized according to a provided scope of work document.

The customizations include:
- UI/UX changes as specified in the scope of work
- Functionality enhancements as detailed in the scope of work

Ideal Skills and Experience:
- Proven experience in customizing mobile applications on both Android and iOS platforms
- Strong UI/UX design skills
- Proficiency in enhancing app functionalities
- Ability to work according to a detailed scope of work

Looking for a developer who can deliver high-quality customizations efficiently. Please provide examples of similar work done.