Senior HTML/CSS Frontend Engineer for AI Training (Remote)

Prolific; United States; Remote; USD 36,000 - 55,000; Full time

Job summary

Prolific is seeking Senior HTML/CSS Developers to join our Expert Network to help train and evaluate AI models. You’ll review AI-generated HTML/CSS for accuracy, semantics, and cross‑browser consistency, and render outputs to verify visuals in real environments.

With a background in Frontend Development or Software Engineering, you’ll tackle a quick 10–15 minute test and, if successful, join Prolific as a paid participant with flexible hours and remote work options.

Qualifications

• BSc or higher in CS/SE/Web Development or related field.
• Senior frontend developer or UI engineer with HTML/CSS specialization.
• Ability to build complex, responsive layouts without relying on frameworks.
• Deep CSS knowledge: cascade, specificity, box model, Flexbox, Grid, accessibility, cross-browser compatibility.
• Maintainable CSS with BEM, design tokens, modern CSS standards.

Responsibilities

• Evaluate AI-generated HTML/CSS for accuracy and semantic structure.
• Audit AI explanations for layout solutions and styling approaches.
• Render model-generated markup in appropriate environments to verify visuals and cross-browser behaviour.
• Annotate model performance by identifying inaccessible markup or deprecated properties.
• Provide feedback to refine how models handle responsive design and design systems.

Skills

HTML/CSS

Frontend Development

CSS concepts

Cross-browser

Code quality

Education

BSc or higher in Computer Science / Software Engineering / Web Development

Tools

Tailwind CSS

SASS/SCSS

CSS Modules

Job description

Prolific is seeking Senior HTML/CSS Developers to join our Expert Network to help train and evaluate AI models. You’ll review AI-generated HTML/CSS for accuracy, semantics, and cross‑browser consistency, and render outputs to verify visuals in real environments.

With a background in Frontend Development or Software Engineering, you’ll tackle a quick 10–15 minute test and, if successful, join Prolific as a paid participant with flexible hours and remote work options.