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

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

Benefits offered by this job

Remote work

Job summary

Prolific Academic Ltd is seeking a senior frontend specialist to help train and assess AI that generates HTML and CSS. You will review generated code, evaluate rendering, and document strengths and weaknesses, all in a remote, paid-task setup.

The role emphasizes semantic markup, responsive components, accessibility WCAG, and cross‑browser compatibility, with flexible hours and task-based rates up to $40/hour.

Qualifications

• Real-world experience in a senior frontend or UI engineering role with an HTML/CSS specialism.
• Confidence building complex responsive interfaces and components without relying on frameworks or libraries.
• Expert knowledge of the CSS cascade, specificity, box model, Flexbox, Grid, WCAG accessibility, and cross-browser support.
• Ability to produce and judge clean semantic markup and maintainable CSS, including BEM conventions and design tokens.
• Deep familiarity with HTML5 and modern CSS features such as custom properties, animations, and contemporary layout systems.

Responsibilities

• Review generated HTML and CSS for functional accuracy, semantic structure, and sound coding practice.
• Audit the model’s explanations of layout and styling choices for technical validity.
• Run markup and stylesheets in a browser to assess appearance and cross-browser behaviour.
• Identify inaccessible output, inefficient selectors, deprecated markup, and unsupported CSS.
• Provide clear feedback on responsive design, component organisation, and design system implementation.

Skills

Senior frontend

HTML/CSS expertise

Responsive design

WCAG accessibility

Cross-browser support

Flexbox

Grid

BEM conventions

Design tokens

HTML5

Modern CSS features

Education

Bachelor's degree or higher in CS/SE/web development

Tools

Browser DevTools

Tailwind

Sass/SCSS

CSS Modules

Job description

Role overview

Use senior frontend skills to help train and assess AI systems that produce HTML and CSS. Assignments involve evaluating generated code and its reasoning, checking how it renders, and documenting technical strengths and shortcomings. Participation follows a brief skills assessment, and work is offered as paid tasks that can be completed remotely and flexibly.

Responsibilities

• Review generated HTML and CSS for functional accuracy, semantic structure, and sound coding practice.
• Audit the model’s explanations of layout and styling choices for technical validity.
• Run markup and stylesheets in a browser to assess appearance and cross-browser behaviour.
• Identify inaccessible output, inefficient selectors, deprecated markup, and unsupported CSS.
• Provide clear feedback on responsive design, component organisation, and design system implementation.

Requirements

• Bachelor’s degree or higher in computer science, software engineering, web development, or a related technical discipline.
• Real-world experience in a senior frontend or UI engineering role with an HTML/CSS specialism.
• Confidence building complex responsive interfaces and components without relying on frameworks or libraries.
• Expert knowledge of the CSS cascade, specificity, box model, Flexbox, Grid, WCAG accessibility, and cross-browser support.
• Ability to produce and judge clean semantic markup and maintainable CSS, including BEM conventions and design tokens.
• Deep familiarity with HTML5 and modern CSS features such as custom properties, animations, and contemporary layout systems.

Nice to have

• Experience with Tailwind, Sass/SCSS, CSS Modules, or component-driven design systems.
• Proficiency with browser DevTools, accessibility auditing, and cross-browser testing tools.

Benefits and work setup

• Flexible, remote paid work, with advertised task rates up to $40 per hour depending on expertise.
• A 10 to 15 minute assessment is required before access to tasks; some assignments need an uninterrupted hour, while others are shorter.