HTML​/CSS - Senior Developers - AI Training - Las Vegas

Contribute senior frontend expertise to the training and evaluation of AI systems through paid, task-based work. You’ll assess generated HTML and CSS, test rendered results, and provide clear technical feedback on implementation quality and reasoning. A short skills assessment is required before joining; tasks may take an uninterrupted hour, though many are shorter.

• Review generated markup and styles for correctness, semantic structure, maintainability, and standards compliance.
• Check the technical soundness of explanations for layout and styling choices.
• Render and inspect code to confirm visual output and cross-browser behavior.
• Flag accessibility issues, inefficient selectors, obsolete attributes, and unsupported CSS.
• Give structured feedback on responsive design, component structure, and design system approaches.

• Bachelor’s degree or higher in computer science, software engineering, web development, or a related field.
• Professional experience as a senior frontend developer or UI engineer focused on HTML and CSS.
• Ability to build complex responsive layouts and components without relying on frameworks or libraries.
• Expert knowledge of the CSS cascade, specificity, box model, Flexbox, Grid, WCAG accessibility, and browser compatibility.
• Strong command of semantic HTML and maintainable CSS, including BEM, design tokens, and modern standards.
• Careful code review skills, including the ability to explain technical issues clearly.

• Experience with Tailwind CSS, Sass/SCSS, CSS Modules, and component-based design systems.
• Familiarity with browser developer tools, accessibility auditing tools, and cross-browser testing platforms.
• Knowledge of HTML5 and modern CSS features such as custom properties, animations, and contemporary layout systems.

• Flexible, remote task work, with compensation reported up to $40 per hour depending on skills and experience.
• A 10–15 minute skills test is used to assess suitability before joining.