UE FPS Prototype Development

I need a first-person shooter prototype developed in Unreal Engine. The main focus is on editable rooms.

Key Requirements:
- Realistic graphics
- Smooth gameplay
- Intricate level design

Customization:
- Users can modify room size and shape
- Change dimensions by dragging to resize walls

Ideal Skills and Experience:
- Proficiency in Unreal Engine
- Strong background in FPS game development
- Experience with room customization mechanics
- Excellent 3D modeling and level design skills

Looking for someone who can bring this concept to life with a high-quality, playable prototype.