Note: The job is a remote job and is open to candidates in USA. 24-MAG LLC connects experienced professionals with remote consulting opportunities across technical, evaluation, and project-based workstreams. The company is seeking an experienced Frontend Engineer for a part-time consulting role evaluating AI-generated frontend implementations against reference designs, with responsibilities spanning visual fidelity, HTML/CSS quality, responsive behavior, browser debugging, and structured technical feedback.
Responsibilities
- Compare a reference webpage against two AI-generated frontend implementations
- Render candidate pages side by side at desktop resolution and determine which more faithfully reproduces the target
- Evaluate overall visual similarity, layout accuracy, and implementation quality
- Identify significant defects and rank them by impact
- Flag ties, ambiguous comparisons, and technically broken evaluation items when appropriate
- Inspect hand-written HTML and CSS for structural and implementation accuracy
- Evaluate semantic markup, flexbox, grid, media queries, and traditional float- or table-based layouts
- Determine whether visual fidelity is achieved through robust layout techniques rather than fragile hardcoded positioning
- Identify excessive absolute positioning, unnecessary inline styles, and other implementation shortcuts
- Assess whether the underlying structure will remain correct outside a single viewport configuration
- Compare box-model behaviour, margins, padding, alignment, and spacing
- Evaluate typography including font family, size, weight, line height, and letter spacing
- Review colours, borders, backgrounds, images, and asset handling
- Inspect stacking order, overflow, clipping, and positioning behaviour
- Identify subtle visual discrepancies that affect replication quality
- Assess how candidate implementations behave when viewport dimensions change
- Evaluate whether responsive layouts use appropriate CSS techniques
- Review heading structure, landmarks, and semantic HTML quality
- Determine whether layouts remain stable and coherent across different dimensions
- Evaluate accessibility-related implementation quality where relevant
- Use browser developer tools to inspect DOM structure and computed styles
- Analyse the CSS box model and cascade to diagnose visual differences
- Use network and asset inspection where necessary to identify rendering issues
- Read JavaScript sufficiently to understand DOM manipulation and page behaviour
- Run provided webpages locally using terminal-based development workflows
- Write structured rationales explaining each preference decision
- Describe specific defects in clear, technically actionable language
- Distinguish major implementation failures from minor cosmetic differences
- Apply evaluation standards consistently across frontend tasks
- Contribute high-quality human preference data used to improve AI-generated frontend code
Skills
- 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 behaviour
- 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
- This opportunity is intended for practising web developers with substantive frontend coding experience
- 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
- Part-time independent contractor engagement
- Fully remote
- Flexible scheduling based on project requirements
- 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
- Part-time independent contractor engagement
- Fully remote
- Flexible scheduling based on project requirements
Company Overview