Looking for Nodejs server configuration on Ubuntu server

We are seeking an experienced freelancer with strong expertise in system architecture and hands-on server configuration on Ubuntu. The ideal candidate should have solid experience deploying and optimizing web applications using:
Node.js
Next.js
Express.js
MySQL
Ubuntu server environment

Key Responsibilities
Design scalable and secure system architecture
Configure and optimize Ubuntu server environment
Deploy and manage Node.js / Next.js applications
Set up and manage MySQL databases
Configure reverse proxy (Nginx/Apache)
Implement SSL, firewall, and security best practices
Optimize application performance and server load handling
Troubleshoot deployment and runtime issues