Optimize Node.js Web App

I'm seeking an experienced Node.js developer to troubleshoot and fix performance bugs in my web application. We're currently facing significant performance issues, particularly with API responses.

Key Requirements:
- Identify and resolve performance bottlenecks
- Optimize API response times
- Ensure code quality and maintainability

Ideal Skills:
- Strong expertise in Node.js
- Experience with performance tuning in web applications
- Proficiency in debugging and problem-solving
- Familiarity with API development and optimization

Please provide examples of similar work done.