HTML/CSS - Senior Developers - AI Training - Nashville, USA

prolificacademicltd; United States; Remote; USD 33,000 - 55,000; Full time

Benefits offered by this job

Remote work

Flexible task-based work

Pay up to $40/hour

Job summary

Prolific Academic Ltd. seeks a senior frontend specialist to contribute expertise to the training and evaluation of AI systems through paid project tasks.

After a short skills assessment, you may be invited to review generated HTML/CSS, test rendering, and give structured feedback on code quality and explanations. Responsibilities include assessing generated markup for correctness and accessibility, rendering across browsers, and flagging issues such as obsolete attributes.

Qualifications

• A bachelor’s degree or higher in computer science, software engineering, web development, or a closely related technical discipline.
• Professional experience as a senior frontend developer or UI engineer with a strong HTML and CSS focus.
• Ability to build complex, responsive layouts and components independently, including without frameworks or libraries.
• Expert knowledge of the CSS cascade, specificity, the box model, Flexbox, Grid, accessibility standards, and browser compatibility.
• Strong command of semantic HTML and maintainable CSS, with familiarity with BEM, design tokens, and modern CSS conventions.
• Experience with HTML5 and modern CSS, plus tools and approaches such as Tailwind, Sass/SCSS, CSS Modules, browser developer tools, accessibility audits, or cross-browser testing.

Responsibilities

• Assess generated markup and styles for correctness, semantics, maintainability, and alignment with frontend best practices.
• Check whether explanations of layout and styling decisions are technically sound.
• Render code and inspect its visual output, including behaviour across browsers.
• Flag issues such as inaccessible markup, inefficient selectors, obsolete attributes, or invalid CSS properties.
• Give clear feedback on the model's handling of responsive layouts, reusable components, and design systems.

Skills

Senior frontend developer

UI engineer

HTML & CSS

Accessibility

Cross-browser compatibility

Semantic HTML

BEM

Design tokens

Modern CSS

Education

Bachelor’s degree or higher in CS / software engineering / web development

Tools

Tailwind

Sass/SCSS

CSS Modules

Browser developer tools

Cross-browser testing

Job description

Role overview

Contribute specialist frontend expertise to the training and evaluation of AI systems through paid project tasks. After a short skills assessment, successful applicants may be invited to review generated HTML and CSS, test how it renders, and give structured feedback on the quality of the code and its explanations.

Responsibilities

• Assess generated markup and styles for correctness, semantics, maintainability, and alignment with frontend best practices.
• Check whether explanations of layout and styling decisions are technically sound.
• Render code and inspect its visual output, including behaviour across browsers.
• Flag issues such as inaccessible markup, inefficient selectors, obsolete attributes, or invalid CSS properties.
• Give clear feedback on the model's handling of responsive layouts, reusable components, and design systems.

Requirements

• A bachelor's degree or higher in computer science, software engineering, web development, or a closely related technical discipline.
• Professional experience as a senior frontend developer or UI engineer with a strong HTML and CSS focus.
• Ability to build complex, responsive layouts and components independently, including without frameworks or libraries.
• Expert knowledge of the CSS cascade, specificity, the box model, Flexbox, Grid, accessibility standards, and browser compatibility.
• Strong command of semantic HTML and maintainable CSS, with familiarity with BEM, design tokens, and modern CSS conventions.
• Experience with HTML5 and modern CSS, plus tools and approaches such as Tailwind, Sass/SCSS, CSS Modules, browser developer tools, accessibility audits, or cross-browser testing.

Benefits and work setup

A short assessment of around 10-15 minutes is part of the selection process. Paid tasks may offer up to $40 per hour depending on skills and experience; some require an uninterrupted hour, while many are shorter. Work is described as flexible and remote, with task availability and pay dependent on the projects offered.