Java to Node.js Backend Integration

We have a Java J2EE backend web application with some features that we need integrated into our new Node.js web app.

This involves:

- Data Processing:
- Transforming data, including:
- Aggregating data from multiple sources
- Cleaning data by removing errors and inconsistencies

- API Endpoints:
- Integrating existing Java API endpoints into the Node.js environment

Ideal skills and experience:
- Proficiency in Java and Node.js
- Experience with data transformation and API integration
- Strong understanding of data aggregation and cleaning techniques

Please provide examples of similar work done.