Custom Minecraft Client Development

I'm seeking an expert in C++ and Java to develop a personalized Minecraft client. The client should feature a macro functionality to automate various tasks and support custom pathfinding.

Key Requirements:
- Design and implementation of a macro system to automate tasks such as resource gathering, building structures, and combat actions, among others.
- Skills in C++ and Java for Minecraft client development.
- Prior experience in game client development is a plus.
- Understanding of Minecraft’s game mechanics and potential for automation.
- Ensure secure user authentication within the custom client.
- Integrate popular mod APIs such as Forge or Fabric.
- Develop a custom graphical user interface tailored to the new features.
- Implement measures to prevent cheating and ensure fair play.
- Focus on optimizing the client for minimal lag and high FPS.
- Ensure the client supports multiple versions of Minecraft.
- Ensure compatibility with popular Minecraft servers and plugins.
- Provide comprehensive user documentation and tutorials for the custom client.
- Allow for customization of keybindings for macro and pathfinding functions.
- Incorporate advanced pathfinding algorithms for efficient navigation.

The ideal candidate will be able to provide a high-performance, mod-supporting client that can be tailored to my specific needs. Please include examples of similar projects you've completed in your proposal.

The macro system should feature a graphical user interface (GUI) for easy interaction. The project needs to be completed within "the client's purchase timeline." Both AI and Hardcoded.