Senior HTML/CSS Frontend Engineer for AI Training — Remote

Prolific; Denver (CO); On-site; USD 45,460 - 64,747; Part time

Job summary

Prolific is seeking Senior HTML/CSS Developers in Denver, Colorado to join their Expert Network. In this role, you will help train AI models by reviewing and auditing generated code while earning competitive pay of up to $40/hr. Candidates should have a strong background in Software Engineering or Frontend Development, including expertise in creating responsive layouts and a deep knowledge of HTML and CSS standards. The position offers flexible working hours and the chance to contribute to cutting-edge technology.

Qualifications

• Proven experience as a Senior Frontend Developer or UI Engineer specializing in HTML/CSS.
• Ability to build complex, responsive layouts independently without frameworks.
• Expert understanding of the CSS cascade, box model, and Flexbox.

Responsibilities

• Review AI-generated HTML/CSS for functional correctness.
• Audit AI explanations for layout solutions and ensure technical soundness.
• Conduct execution testing of model-generated markup.

Skills

HTML/CSS mastery

Responsive layout implementation

Cross-browser compatibility

Semantic markup

BEM methodology

Accessibility standards

Education

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

Tools

Browser DevTools

Accessibility auditing tools

Cross-browser testing platforms

Job description

Prolific is seeking Senior HTML/CSS Developers in Denver, Colorado to join their Expert Network. In this role, you will help train AI models by reviewing and auditing generated code while earning competitive pay of up to $40/hr. Candidates should have a strong background in Software Engineering or Frontend Development, including expertise in creating responsive layouts and a deep knowledge of HTML and CSS standards. The position offers flexible working hours and the chance to contribute to cutting-edge technology.