How do you evaluate your professional skills and level of competence?

Assessing my professional skills in Node.js, I would highlight the following points:

• Knowledge of JavaScript fundamentals and the specifics of Node.js, including the event loop and asynchronous programming.
• Ability to work with core Node.js modules such as fs, http, events.
• Experience in creating REST APIs using Express.js or similar frameworks.
• Understanding of working with databases (e.g., MongoDB, PostgreSQL) and integrating them with Node.js.
• Debugging and testing skills, using tools like nodemon, mocha.

Overall, I rate myself at a junior/middle level, confidently solving medium complexity tasks and continuing to develop in the Node.js backend development field.