HTML/CSS - Senior Developers - AI Training - Belfast, UK

prolificacademicltd; Stati Uniti; Remoto; USD 44.000 - 55.000; Tempo pieno

Vantaggi offerti da questo lavoro

Remote work

Paid tasks/assessments

Hourly pay up to $40

Descrizione del lavoro

Prolific Academic Ltd. is seeking a senior frontend engineer to contribute expertise in HTML and CSS for AI model training and evaluation. You will review markup, verify rendering results, and provide structured feedback on implementation quality.

Role is remote with task-based paid assessments. Some tasks may require an uninterrupted hour, with shorter assignments possible depending on project needs.

Competenze

• Degree in computer science, software engineering, web development or related field.
• Professional experience as a senior frontend developer/UI engineer focused on HTML and CSS.
• Ability to build complex responsive layouts and components without frameworks.
• Strong understanding of CSS specificity, cascade, box model, Flexbox, Grid, accessibility, and browser compatibility.

Mansioni

• Assess generated markup and styles for correctness, semantics, and maintainability.
• Check explanations of layout and styling decisions for technical soundness.
• Render and inspect code to verify visual results and cross-browser behaviour.
• Flag accessibility problems, inefficient selectors, outdated markup, and invalid CSS.
• Provide feedback on responsive layouts, component structure, and design system approaches.

Conoscenze

HTML/CSS expertise

Senior frontend developer

Cross-browser compatibility

Accessibility (WCAG)

Responsive layouts

CSS specificity and cascade

Formazione

Bachelor degree in CS/SE/Web Development or related

Strumenti

Tailwind CSS

Sass/SCSS

CSS Modules

Design tokens

Browser dev tools

Accessibility auditing tools

Descrizione del lavoro

Role overview

Contribute senior frontend expertise to training and evaluating AI models that generate HTML and CSS. Work is task based: review code and technical explanations, check rendered results, and give structured feedback on implementation quality. Candidates complete a short skills assessment before joining; tasks may require an uninterrupted hour, though some are shorter.

Responsibilities

• Assess generated markup and styles for correctness, semantics, and maintainability.
• Check whether explanations of layout and styling decisions are technically sound.
• Render and inspect code to verify visual results and cross-browser behaviour.
• Flag accessibility problems, inefficient selectors, outdated markup, and invalid CSS.
• Give feedback on responsive layouts, component structure, and design system approaches.

Requirements

• A degree at bachelor level or higher in computer science, software engineering, web development, or a related technical field.
• Professional experience as a senior frontend developer or UI engineer focused on HTML and CSS.
• Ability to build complex responsive layouts and components without depending on frameworks or libraries.
• Strong understanding of CSS specificity and the cascade, the box model, Flexbox, Grid, WCAG accessibility, and browser compatibility.
• High standards for semantic HTML and maintainable CSS, including familiarity with BEM, design tokens, and modern CSS.
• Expert knowledge of HTML5 and modern CSS, including custom properties, animations, and current layout techniques.

Nice to have

• Experience with Tailwind CSS, Sass/SCSS, CSS Modules, or component based design systems.
• Familiarity with browser developer tools, accessibility auditing tools, and cross-browser testing services.

Benefits and work setup

• Remote, flexible participation with paid tasks; listed rates may reach $40 per hour depending on skills and experience. Successful candidates can join after a 10 to 15 minute assessment.