Interactive Dashboards with JS charts Expert Needed

I'm seeking a freelancer with deep expertise in JavaScript and a particular proficiency with Highcharts. The project involves creating interactive dashboards, so your experience with this library should include constructing engaging, user-friendly interfaces.

Key Responsibilities:
- Designing and implementing interactive dashboards using Highcharts
- Connecting the dashboards to various data sources, including APIs, databases, and CSV/Excel files.
- Integrating user authentication and role-based access controls.
- Optimizing the performance of the dashboards for faster loading times.

Ideal Skills:
- Extensive experience with Highcharts, d3js, plotly or other similar framework
- Proficient in JavaScript
- Skilled in data visualization
- Experienced in connecting dashboards to multiple data sources.

If you have a portfolio that includes similar projects, please share.