First-Person Action Game Development

I need an experienced game developer to create an action game for both iOS and Android platforms. The game will be in first-person perspective.

Key Requirements:
- First-person action game development
- Experience with iOS and Android platforms
- Strong programming skills
- Ability to design engaging gameplay mechanics
- Proficiency in 3D modeling and animation

Ideal Skills:
- Unity or Unreal Engine expertise
- Background in mobile game development
- Creative problem-solving
- Good communication skills

Please provide a portfolio with relevant work.