Senior HTML/CSS Frontend Developer for AI Training

Prolific; Belfast; On-site; GBP 30,567 - 40,757; Part time

Job summary

Prolific is looking for Senior HTML/CSS Developers to join our Expert Network in Belfast, UK. The role involves training and evaluating AI models, focusing on writing high‑quality frontend code and design implementation. Ideal candidates will possess a BSc in Computer Science or related fields along with real-world experience in frontend development. The position offers competitive pay of up to $40/hr, along with the flexibility to work on various tasks that may require one hour of uninterrupted effort.

Qualifications

• Real‑world experience as a Senior Frontend Developer or UI Engineer.
• Ability to independently build complex, responsive layouts and components.
• Expert understanding of the CSS cascade, specificity, and box model.

Responsibilities

• Review AI‑generated HTML/CSS for functional correctness and adherence to best practices.
• Audit AI's explanations for layout solutions to ensure technical soundness.
• Render model‑generated markup to verify visual output.

Skills

Expert mastery of HTML5

Expert mastery of CSS3/4

Experience with Tailwind CSS

Proficiency with browser DevTools

Education

BSc or higher in Computer Science, Software Engineering, or Web Development

Tools

Accessibility auditing tools (axe, Lighthouse)

Job description

Prolific is looking for Senior HTML/CSS Developers to join our Expert Network in Belfast, UK. The role involves training and evaluating AI models, focusing on writing high‑quality frontend code and design implementation. Ideal candidates will possess a BSc in Computer Science or related fields along with real-world experience in frontend development. The position offers competitive pay of up to $40/hr, along with the flexibility to work on various tasks that may require one hour of uninterrupted effort.