An HTML CSS Developer is a web developer who specializes in creating and styling the visual aspects of web pages using HTML (Hypertext Markup Language) and CSS (Cascading Style Sheets). These developers are responsible for designing the layout, appearance, and interactivity of websites. Here are key responsibilities and skills of an HTML CSS Developer:

Responsibilities:

1. Web Page Structure:
1. Use HTML to structure web pages, defining the layout, headings, paragraphs, lists, links, and other structural elements.
2. CSS Styling:
1. Apply CSS styles to HTML elements to control the visual presentation of the website, including colors, fonts, margins, and spacing.
2. Ensure responsive design for various screen sizes and devices.
3. Cross-Browser Compatibility:
1. Write CSS code that works consistently across different web browsers to maintain a consistent user experience.
4. Responsive Web Design:
1. Implement responsive design techniques using media queries to make websites adapt to various screen sizes, including desktop, tablet, and mobile.
5. CSS Frameworks:
1. Utilize CSS frameworks such as Bootstrap or Foundation to streamline the design process and ensure consistency.
6. Animations and Effects:
1. Create animations and special effects using CSS, including transitions, transforms, and keyframe animations.
7. Performance Optimization:
1. Optimize CSS code and assets to improve website loading speed and performance.
8. Browser Developer Tools:
1. Use browser developer tools to inspect and debug HTML and CSS code.
9. Accessibility:
1. Ensure that web pages are accessible to users with disabilities by following web accessibility guidelines (WCAG) and using ARIA roles and attributes when needed.
10. Version Control:
1. Use version control systems like Git to manage and collaborate on code changes.
11. Collaboration:
1. Collaborate with other team members, such as front-end and back-end developers, to integrate HTML and CSS with back-end functionality.

Skills and Qualities:

• Proficiency in HTML5 and CSS3.
• Strong understanding of CSS selectors, specificity, and inheritance.
• Knowledge of CSS preprocessors like Sass or Less.
• Experience with responsive web design and mobile-first development.
• Familiarity with front-end development tools and build systems (e.g., Webpack, Gulp).
• Basic understanding of JavaScript for interactivity and DOM manipulation.
• Attention to detail and an eye for design aesthetics.
• Problem-solving skills to address cross-browser compatibility issues.
• Knowledge of web performance optimization techniques.
• Ability to work independently and as part of a team.
• Effective communication skills to collaborate with designers and developers.

HTML CSS Developers play a crucial role in the front-end development process, translating design concepts into functional and visually appealing web pages. They ensure that websites are user-friendly, responsive, and optimized for performance, contributing to a positive user experience.