What is your practical experience in working on commercial projects?

Practical experience in working on commercial projects is usually measured in years and reflects participation in real development, support, and enhancement of software products.

For a junior level, typically 0 to 1-2 years of experience is sufficient, including internships and small projects.

For a middle level — from 2 to 5 years, with experience working in a team, understanding the development lifecycle, debugging, and optimization skills.

It's important not only to the number of years but also the quality of experience: participation in the full development cycle, solving real problems, interacting with clients and colleagues.

Regarding Node.js, practical experience may include:

• Developing server logic and APIs
• Working with databases
• Integrating with external services
• Performance optimization
• Writing tests and documentation

Example of describing experience:

"3 years of commercial development on Node.js, including creating REST APIs for an e-commerce platform, integrating with payment systems, and optimizing server application performance."