Frontend Engineer – Web UI Evaluation
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Job Description
Frontend engineer evaluating AI-generated webpage implementations for 24-MAG’s remote consulting platform. Comparing visual fidelity, responsive behavior, code quality, and accessibility.
Responsibilities:
- Compare a reference webpage against two AI-generated frontend implementations
- Render candidate pages side by side at desktop resolution and assess fidelity to the target
- Evaluate visual similarity, layout accuracy, implementation quality, and responsive behavior
- Identify, rank, and describe significant defects; flag ties, ambiguities, and technically broken evaluation items
- Inspect HTML, CSS, DOM structure, computed styles, the cascade, network activity, and assets using browser developer tools
- Evaluate semantic markup, flexbox, CSS Grid, media queries, float- or table-based layouts, and accessibility-related implementation quality
- Perform pixel-level analysis of box-model behavior, typography, colors, borders, backgrounds, images, stacking, overflow, clipping, and positioning
- Run provided webpages locally using terminal-based development workflows
- Write structured, technically actionable rationales for preference decisions
- Apply evaluation standards consistently and contribute human preference data to improve AI-generated frontend code
Requirements:
- 3+ years of professional frontend or full-stack web development experience
- Strong proficiency with HTML and CSS
- Deep understanding of semantic markup, flexbox, CSS Grid, media queries, and responsive design
- Ability to read and reason about legacy float- and table-based layouts
- Strong working knowledge of browser developer tools, including element inspection, computed styles, the box model, and network inspection
- Sufficient JavaScript knowledge to understand scripts and DOM behavior
- Comfortable using a terminal to run and inspect local web projects
- Strong ability to identify visual differences at a detailed, pixel-level standard
- Excellent written English and ability to justify technical evaluation decisions precisely
- Desktop or laptop capable of displaying a browser window at 1920px width or greater
- Administrator rights on the machine used for project work
- Ability to install and run a local development or static-server environment
- Work must be completed without using confidential or proprietary information belonging to any employer, client, institution, or other third party
- H1-B and STEM OPT support is unavailable for this engagement
- Experience translating Figma, PSD, or comparable designs into production frontend code is highly valued
- Prior code review, technical assessment, RLHF, preference evaluation, or AI model evaluation experience is advantageous
- Familiarity with WCAG, ARIA, accessibility testing, web scraping, or DOM parsing is beneficial
- Experience with common failure patterns in LLM-generated frontend code is highly valued
Benefits:
- Flexible scheduling based on project requirements
- Fully remote work
- Part-time independent contractor engagement
- Projects may be extended, shortened, or concluded based on project needs and performance
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