3D Game Creator Tool Development new

I'm seeking a seasoned game developer to create a 3D game creator tool akin to Roblox or Sandbox.game
.

Key Features:
- Comprehensive world-building tools
- Extensive character creation capabilities
- Robust multiplayer functionalities

The world-building tools should offer:
- Advanced terrain editing: Users should have the ability to modify terrain intricately.

The environment should be a blend of:
- Urban landscapes
- Natural landscapes

Ideal Skills and Experience:
- Proficient in game development
- Experienced in creating 3D game creator tools
- Understanding of advanced terrain editing
- Expertise in designing mixed environments
- Knowledgeable in implementing multiplayer capabilities.