HTML and CSS Developer

$70/hr

89 people hired

RemoteGlobalTechnology3-5 YearsContractPosted Aug 7, 2026

About this role

As an HTML / CSS Developer, you will work remotely on an hourly paid basis to review AI-generated HTML/CSS code, UI layouts, and technical explanations, as well as produce high-quality reference implementations and step-by-step reasoning for common and complex frontend tasks. You will assess solutions for correctness, clarity, accessibility, responsiveness, cross-browser compatibility, and adherence to the prompt; identify issues in semantic HTML, layout (Flexbox/Grid), responsive behavior, CSS architecture, specificity/cascade conflicts, and performance; fact-check technical information; write high-quality explanations and model solutions that demonstrate best practices; and rate and compare multiple AI responses based on correctness and reasoning quality.

Responsibilities

Develop AI Training Content: Create detailed prompts across HTML/CSS topics and write high-quality reference answers to guide AI learning.
Optimize AI Performance: Evaluate and rank AI responses to improve semantic correctness, accessibility, responsiveness, and visual fidelity.
Ensure Model Integrity: Test AI outputs for inaccuracies or unsafe recommendations, validating reliability across real-world UI use cases.

Qualifications

Bachelor’s degree in Computer Science, Design, HCI, or a related field (or equivalent practical experience).
4+ years of professional experience building production UIs with semantic HTML and modern CSS.
Expert-level proficiency in CSS layout (Flexbox, Grid), responsive patterns, and component-based styling approaches.
Strong accessibility knowledge: semantic structure, ARIA basics, keyboard navigation, focus management fundamentals, and WCAG-aware design.
Strong understanding of browser behavior: box model, stacking context, positioning, rendering quirks, and cross-browser testing strategy.
Experience with CSS maintainability: naming conventions (BEM or similar), design tokens, variables, theming, and avoiding specificity wars.
Familiarity with modern tooling is a plus (Sass/PostCSS, Tailwind, CSS Modules, styled systems), but role focuses on core HTML/CSS correctness.
Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines.
Proven experience conducting detailed code reviews and enforcing UI quality standards for accessibility, responsiveness, and maintainability.
Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus.
Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in UI behavior.