Tell about your commercial experience and the technology stack you have worked with.

In commercial projects, I mainly worked with frontend technologies: React, Redux, TypeScript, as well as CSS preprocessors (Sass, Less) and build tools (Webpack). My experience includes developing SPAs, integrating with REST APIs, optimizing performance, and writing unit tests with Jest and React Testing Library. I also have experience working with Next.js for server-side rendering and SEO enhancement.