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HTML/CSS - Senior Developers - AI Training - San Francisco, USA

Prolific · San Francisco, CA · 4 mo ago
RemoteRemoteEngineering$40/hrTemporary

The Role

We're looking for Senior HTML/CSS Developers to join our Expert Network to help train and evaluate cutting-edge AI models. If you have a background in Software Engineering or Frontend Development, we'll send you a quick 10- to 15-minute test to assess your skills. If successful, you'll be invited to join Prolific as a participant, where you'll get paid to help AI understand and produce high-quality frontend code and design implementation.

Requirements

  • Educational Background: a BSc or higher in Computer Science, Software Engineering, Web Development, or a closely related technical field.
  • Professional Experience: real-world experience as a Senior Frontend Developer or UI Engineer specialising in HTML/CSS.
  • Coding Proficiency: ability to independently build complex, responsive layouts and components without relying on frameworks or libraries.
  • Deep Domain Knowledge: expert understanding of the CSS cascade, specificity, the box model, Flexbox, CSS Grid, accessibility standards (WCAG), and cross-browser compatibility.

Qualifications

  • Code Quality: a high standard for clean, semantic markup and maintainable CSS, including adherence to BEM methodology, design tokens, and modern CSS standards.

Skills

  • Core Languages: expert mastery of HTML5 and CSS3/4, including custom properties, animations, and modern layout systems.
  • Frameworks & Methodologies: extensive experience with Tailwind CSS, SASS/SCSS, or CSS Modules, and familiarity with component-driven design systems.
  • Testing & Tools: proficiency with browser DevTools, accessibility auditing tools (e.g., axe, Lighthouse), and cross-browser testing platforms.

Benefits

  • Competitive pay rates.
  • Flexible working hours.
  • Ability to work from home.

Pay

Researchers looking for your skills tend to pay up to $40/hr, depending on skills and experience.

Schedule

You must be prepared to complete paid tasks that require one hour of uninterrupted work, though many are shorter.

Links to More Information

Links to more information on Prolific

Privacy Statement

By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal personal information.

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