HTML/CSS - Senior Developers - AI Training - USA

Role overview

Use senior frontend experience to help train and evaluate AI systems through paid, task-based work. The focus is on judging whether generated HTML and CSS produce sound, accessible interfaces and whether the model’s explanations reflect reliable engineering practice.

Responsibilities

- Check generated HTML and CSS for functional accuracy, semantic structure, and code quality. - Review explanations of layout and styling choices for sound reasoning. - Run generated code in suitable environments and inspect visual results across browsers. - Identify accessibility problems, inefficient selectors, outdated attributes, and unsupported CSS. - Give structured feedback on responsive implementation, component design, and design systems.

Requirements

- A bachelor’s degree or higher in computer science, software engineering, web development, or a closely related field. - Professional experience in a senior frontend or UI engineering role specializing in HTML and CSS. - Ability to create complex responsive layouts and components independently, without depending on frameworks or libraries. - Expert knowledge of CSS fundamentals and modern layout techniques, including the cascade, specificity, Flexbox, and Grid. - Strong grasp of accessibility standards, browser compatibility, semantic markup, and maintainable CSS conventions. - Proficiency with modern HTML and CSS standards and browser developer tools.

Nice to have

- Experience with Tailwind CSS, Sass/SCSS, CSS Modules, component-driven design systems, accessibility audit tools, or cross-browser testing tools.

Benefits and work setup

- Flexible remote participation is available after passing a brief skills assessment. - Tasks are paid and may require up to an hour of uninterrupted work, though many take less time. Rates are listed as up to $40 per hour, based on skills and experience.