Java/Python Utility for XML to JSON Mapping

I require an expert in Java or Python to develop a utility capable of mapping fields from XML to JSON. The utility will specifically handle metadata information, so understanding and processing this type of data is crucial.

Key processing requirements include:
- Handling authoring and development attribute details
- Mapping contributor names and roles
- Identifying and processing attributes
- Tracking code versions

Ideal candidates for this project should have:
- Extensive experience in Java/Python
- Strong understanding of XML and JSON
- Previous experience with similar utility development
- Able to handle complex metadata processing.