Frontend Engineer
Position:

Frontend Engineer
Type:

Freelance Hourly Contract
Compensation:

$90/hour
Location:

Remote
About the Opportunity
This opportunity is for experienced

Frontend Engineers and Full-Stack Developers

interested in evaluating AI-generated web interfaces and code.
The work focuses on comparing AI-generated frontend implementations against real-world reference websites, assessing both

visual fidelity and underlying code quality .
This is an evaluation-focused role rather than a traditional development position. The key requirement is the ability to identify how a webpage is constructed, recognize technical shortcuts, and provide precise, evidence-based evaluations.
What You'll Do
Render a reference webpage and two AI-generated implementations at a

1920×1080 viewport

and evaluate which version most accurately reproduces the reference.
Compare visual fidelity across different interface states, including

layout, spacing, typography, colors, borders, images, layering, and overflow behavior .




Review the source code of AI-generated implementations and assess

HTML structure, CSS architecture, responsiveness, maintainability, and implementation quality .
Identify technical shortcuts such as excessive hardcoded positioning, unnecessary absolute positioning, poorly structured markup, or image-based recreations.
Test responsive behavior across different viewport sizes and identify layout or usability defects.
Use browser DevTools to inspect elements, computed styles, DOM structure, and interactive states.
Provide

specific, evidence-based written justifications

explaining why one implementation is stronger than another.
Identify genuinely broken evaluation tasks while distinguishing them from tasks that are simply challenging.
Required Qualifications
3–8 years of professional web development experience , primarily in frontend or full-stack engineering.
Strong hands-on experience with

HTML, CSS, JavaScript, responsive web development, and modern f

📌 Frontend Engineer (Madrid)
🏢 Synthires
📍 Madrid