Senior Frontend Engineer - AI Training (Remote)

Prolific Academic Ltd

United States

Remote

USD 48,000 - 62,000

Full time

14 days+

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Benefits offered by this job

Flexible hours

Work from home

Job summary

Prolific is seeking Senior HTML/CSS Developers to join its Expert Network. You will evaluate and refine AI-generated frontend code, ensuring semantic structure, accessibility, and robust cross-browser compatibility.

A background in frontend engineering or web development is essential, with a focus on clean markup and scalable CSS. Expected tasks include auditing model outputs, testing in real environments, and providing structured feedback on layout, design systems, and responsive components.

Qualifications

Real-world experience as a Senior Frontend Developer or UI Engineer specializing in HTML/CSS.
Strong ability to build complex, responsive layouts and components without heavy frameworks.
Deep knowledge of CSS cascade, specificity, box model, Flexbox, Grid, WCAG, and cross-browser compatibility.

Responsibilities

Evaluate AI-generated HTML/CSS for accuracy and semantic structure.
Audit AI explanations for layout and styling logic to ensure sound reasoning.
Render and test model-generated markup across environments for visual correctness.
Annotate Accessibility, selectors, deprecated attributes, and CSS properties in outputs.
Provide feedback on responsive design, component architectures, and design system implementation.