Proficient in HTML5 and CSS3, including Flexbox and Grid. Understand CSS preprocessors like SASS or LESS. Strong grasp of core JavaScript ES6+ and familiar with React and Angular. Proficient with Git, including branching and merging, and familiar with GitHub and GitLab. Experienced with npm and yarn for package management. Skilled in build tools like Webpack and Babel, and understand task runners like Gulp. Basic knowledge of testing frameworks like Jest and Mocha. Experienced with RESTful APIs and familiar with GraphQL. Capable of implementing responsive design and familiar with Bootstrap. Proficient in using text editors like VSCode and experienced with browser developer tools for debugging.