Delphi XE3 Interface for .NET DLL

I need a Delphi XE3 interface to access all functions and methods of a DLL. This DLL is used to communicate with a Payment Terminal. I also need a test application in Delphi that can interact with this DLL effectively.

Key Requirements:
- The interface must be compatible with Delphi XE3
- The interface should allow accessing all functions and methods present in the DLL
- The test application should effectively call all functions in the DLL
- It should be able to display results from the DLL
- It should be able to pass parameters to the DLL functions
- It should be able to receive and decode callback status from the DLL

Ideal Skills and Experience:
- Proficiency in Delphi XE3
- Experience in interfacing with .NET DLLs
- Familiarity with Payment Terminal communication
- Strong problem-solving abilities
- Ability to write clear and concise code
- Good communication skills

Please share your relevant experience and provide a timeline for completing this project. Thank you.