Senior Frontend Engineer - HTML/CSS | Flexible Remote Tasks

prolificacademicltd; United States; Remote; USD 45,000 - 65,000; Full time

Benefits offered by this job

Up to $40/hr

Job summary

prolificacademicltd is seeking a senior frontend engineer to contribute expertise to the training and evaluation of AI systems through paid, task-based work. You will review 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.

Qualifications

• Senior frontend developer or UI engineer focused on HTML and CSS.
• Ability to build complex responsive layouts without frameworks.
• Strong knowledge of CSS cascade, specificity, and cross-browser compatibility.
• Knowledge of semantic HTML and maintainable CSS (BEM, tokens).

Responsibilities

• Review generated markup and styles for correctness, semantics.
• 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.
• Provide structured feedback on responsive design and component structure.

Skills

HTML & CSS

Semantic HTML

Responsive layouts

Flexbox & Grid

WCAG Accessibility

Design tokens

BEM

Education

Bachelor’s degree or higher in CS/SE/Web dev

Tools

Tailwind CSS

Sass/SCSS

CSS Modules

Design system tooling

Job description

prolificacademicltd is seeking a senior frontend engineer to contribute expertise to the training and evaluation of AI systems through paid, task-based work. You will review 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.