Mobile Math Quiz Game Development

I'm seeking an experienced mobile game developer to create an engaging quiz-based math game for users aged 13 and above. The game should be available on both iOS and Android platforms.

Key Requirements:
- Quiz-based gameplay focused on math challenges
- Engaging user interface and experience tailored for 13+ age group
- Compatible with both iOS and Android

Ideal Skills:
- Experience in mobile game development, especially on quiz or educational games
- Strong knowledge of UI/UX design for mobile applications
- Proficiency in programming languages relevant to iOS and Android development

Please share your portfolio and relevant experience.