HTML/CSS - Senior Developers - AI Training - San Francisco, USA
Prolific · San Francisco, CA
- Hybrid
- Temporary
- $40,000 / year
- San Francisco, CA
Job highlights
- Train and evaluate cutting-edge AI models.
- Review and audit AI-generated frontend code.
- Provide expert feedback on AI logic.
- Work flexibly from home.
- Earn up to $40/hr as a participant.
About the role
About Prolific
Prolific is building the biggest pool of quality human data in the world, serving over 35,000 AI developers, researchers, and organizations.
The Role: Senior HTML/CSS Developer for AI Training
We are seeking experienced Senior HTML/CSS Developers to join our Expert Network. In this role, you will help train and evaluate cutting-edge AI models. If you have a background in Software Engineering or Frontend Development, you will first complete a short assessment. Upon success, you will join Prolific as a paid participant, contributing to AI's understanding and production of high-quality frontend code and design implementation. Researchers typically offer up to $40/hr, with tasks requiring approximately one hour of uninterrupted work, though many are shorter.
What You'll Bring
- Educational Background: BSc or higher in Computer Science, Software Engineering, Web Development, or a related technical field.
- Professional Experience: Real-world experience as a Senior Frontend Developer or UI Engineer specializing in HTML/CSS.
- Coding Proficiency: Ability to build complex, responsive layouts and components independently, without frameworks or libraries.
- Deep Domain Knowledge: Expert understanding of the CSS cascade, specificity, box model, Flexbox, CSS Grid, WCAG accessibility standards, and cross-browser compatibility.
- Code Quality: High standards for clean, semantic markup and maintainable CSS, including adherence to BEM methodology, design tokens, and modern CSS standards.
What You'll Be Doing
- Evaluate Code Accuracy: Review AI-generated HTML/CSS for functional correctness, semantic structure, and best practice adherence.
- Validate Logic & Reasoning: Audit AI-provided explanations for layout and styling solutions to ensure technical soundness.
- Conduct Execution Testing: Render model-generated markup and stylesheets to verify visual output and cross-browser behavior.
- Annotate Model Performance: Identify areas where models produce inaccessible markup, inefficient selectors, deprecated attributes, or hallucinated CSS properties.
- Refine Technical Logic: Provide structured feedback on AI reasoning for responsive design, component architecture, and design system implementation.
Key Technologies
- 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; familiarity with component-driven design systems.
- Testing & Tools: Proficiency with browser DevTools, accessibility auditing tools (e.g., axe, Lighthouse), and cross-browser testing platforms.
Why Prolific is a Great Platform to Join as a Participant
Join Prolific to influence future AI models by contributing your expertise. After a quick 15-minute setup post-assessment, enjoy competitive pay, flexible hours, and remote work. Prolific connects researchers with a global participant pool for high-quality, ethically sourced data, driving AI innovation. We believe human perspectives are key to the next AI leap, and Prolific provides the infrastructure for this.
Key skills/competency
- Senior HTML/CSS Developer
- Frontend Development
- AI Model Training
- Code Evaluation
- Responsive Design
- CSS Layouts (Flexbox, Grid)
- Web Accessibility (WCAG)
- Cross-browser Compatibility
- Semantic HTML
- CSS Methodologies (BEM)
Skills & topics
- Senior HTML/CSS Developer
- Frontend Development
- AI Training
- Code Evaluation
- Web Development
- UI Engineer
- CSS
- HTML
- Responsive Design
- AI
How to get hired
- Research Prolific's Mission: Understand how they gather human data for AI development.
- Tailor your Resume: Highlight senior-level HTML/CSS experience and AI-related projects.
- Excel in the Assessment: Demonstrate deep knowledge of CSS, layouts, and accessibility.
- Prepare for Paid Tasks: Be ready for focused, one-hour sessions reviewing AI code.
Technical preparation
Master HTML5 semantic elements.,Practice complex CSS layouts (Grid, Flexbox).,Review WCAG accessibility guidelines.,Understand CSS cascade and specificity.
Behavioral questions
Describe a challenging frontend project.,How do you ensure code quality?,How do you approach debugging CSS?,Explain your experience with accessibility.
Frequently asked questions
- What is Prolific's role in AI development?
- Prolific provides a platform for AI developers and researchers to gather high-quality human data from paid participants. This data is crucial for training and evaluating AI models, ensuring they are accurate, nuanced, and aligned with human behavior and understanding.
- What specific HTML/CSS skills are most important for this Senior Developer role at Prolific?
- We are looking for deep expertise in HTML5 and CSS3/4, including advanced concepts like the CSS cascade, specificity, box model, Flexbox, CSS Grid, and modern CSS properties. Proficiency in accessibility standards (WCAG) and cross-browser compatibility is also essential, alongside a strong understanding of semantic markup and methodologies like BEM.
- How does the AI training and evaluation process work for Senior HTML/CSS Developers on Prolific?
- As a participant, you will review AI-generated HTML/CSS code for accuracy, semantic structure, and adherence to best practices. You will also audit the AI's reasoning for solutions, conduct execution testing to verify visual output, and provide structured feedback on areas where the AI needs improvement.
- What is the typical compensation for a Senior HTML/CSS Developer participating in AI training tasks on Prolific?
- Researchers on the Prolific platform typically pay up to $40 per hour for participants with specialized skills like senior-level HTML/CSS development. The exact rate depends on your skills and the specific requirements of the paid tasks.
- How long do the paid tasks for AI training typically take on Prolific?
- You should be prepared to complete paid tasks that require up to one hour of uninterrupted work. However, many of these tasks are shorter, allowing for flexibility in your schedule.
- What educational background is required to join Prolific as a Senior HTML/CSS Developer participant?
- A BSc or higher degree in Computer Science, Software Engineering, Web Development, or a closely related technical field is required. This is in addition to practical, real-world experience as a Senior Frontend Developer or UI Engineer.
- Can I work on AI training tasks for Prolific remotely?
- Yes, Prolific offers flexible hours and the ability to work from home. Once you pass the assessment, you can easily join the platform and start contributing to AI model training from anywhere.
- What is the application process for Senior HTML/CSS Developers interested in Prolific's AI training?
- Interested candidates first complete a quick 10- to 15-minute skills assessment. If successful, you'll be invited to join Prolific as a participant. The platform aims for a quick onboarding process after the assessment.