Varun's response indicates a lack of experience in ensuring cross-browser compatibility and responsive design, which are essential skills for a software developer role, especially in frontend development. This response does not align with the job requirements, which emphasize proficiency in JavaScript, CSS, and frontend frameworks like Bootstrap. To improve, Varun could gain experience in using CSS resets, vendor prefixes, and tools like BrowserStack for testing. Additionally, learning about responsive design principles, such as the mobile-first approach and using frameworks like Bootstrap, would enhance his skill set.