Senior HTML/CSS Frontend Engineer — AI Training (Remote)

Prolific; Washington (District of Columbia); On-site; USD 45,460 - 64,747; Part time

Benefits offered by this job

Flexible hours

Ability to work from home

Job summary

Prolific is seeking Senior HTML/CSS Developers to join its Expert Network in Washington, DC. You will help train AI models by evaluating HTML/CSS accuracy, validating logic, and conducting execution testing. Ideal candidates have a BSc in Computer Science or a related field, extensive frontend development experience, and mastery of modern HTML/CSS standards. The position offers competitive pay rates up to $40/hr, flexible hours, and the ability to work remotely.

Qualifications

• Real-world experience as a Senior Frontend Developer or UI Engineer specializing in HTML/CSS.
• Ability to independently build complex layouts without frameworks.
• Expert understanding of accessibility standards (WCAG) required.

Responsibilities

• Review AI-generated HTML/CSS for correctness and best practices.
• Verify model-generated markup in different environments.
• Provide structured feedback on responsive design and component architecture.

Skills

Building complex responsive layouts

Expert understanding of CSS cascade and box model

Clean semantic markup

Cross-browser compatibility

High proficiency in HTML/CSS

Education

BSc or higher in Computer Science, Software Engineering or related field

Tools

Tailwind CSS

SASS/SCSS

Browser DevTools

Job description

Prolific is seeking Senior HTML/CSS Developers to join its Expert Network in Washington, DC. You will help train AI models by evaluating HTML/CSS accuracy, validating logic, and conducting execution testing. Ideal candidates have a BSc in Computer Science or a related field, extensive frontend development experience, and mastery of modern HTML/CSS standards. The position offers competitive pay rates up to $40/hr, flexible hours, and the ability to work remotely.