As an experienced Technical Lead with fullstack skills including Node.js, MySQL, PHP, and HTML5/CSS3, my proficiency aligns perfectly with your project requirements. Firstly, I understand your concern about minimizing server load. By utilizing Node.js and wss connection for real-time visitor tracking, I can ensure your application remains lightweight and efficient.
Secondly, my extensive experience with MySQL will be invaluable in updating and managing the database effectively. I have a deep understanding of how to craft performant queries that optimize the system's response time.
Lastly, apart from technical abilities, I believe in taking full ownership of my work, which means I'll remain committed to providing you with a solution that matches your exact specifications. As a technical enthusiast myself, I keep honing my skills to stay on top of the newest industry trends - a trait that will undoubtedly benefit your project.
In conclusion, choosing me for this task guarantees not only a highly skilled developer but also a committed team member eager to ensure successful completion of this project. Thank you for considering me!