Enhance Node.js & Angular Web Portal

I need to add new functionality and enhance both the frontend and backend of my existing web portal built with Node.js and Angular.

Key Requirements:
- User authentication
- Data visualization
- Reporting tools

Ideal Skills and Experience:
- Proficiency in Node.js and Angular
- Strong background in user authentication systems
- Experience with data visualization libraries and tools
- Ability to develop comprehensive reporting tools
- Previous work examples in similar projects