JavaScript RESTful API Expert Needed

I'm in need of someone highly proficient with JavaScript who can create a RESTful API specifically for handling user authentication.

Key Tasks:
- Design and create a RESTful API using JavaScript
- Implement user authentication within the API

Ideal Freelancer:
- Proficient in JavaScript and RESTful API creation
- Experienced with building systems for user authentication
- Strong problem-solving skills

Please only apply if you have hands-on experience with these requirements. Your expertise in building secure, scalable APIs will be crucial for this project.