HTML and CSS Developer

Role Overview

This remote contractor position is focused on hourly paid work involving HTML and CSS quality review, reference solution creation, and technical evaluation tasks. You will examine AI-generated code, UI structures, and explanations, then verify whether they are accurate, clear, accessible, responsive, and aligned with the prompt. The work also includes creating strong model answers and step-by-step reasoning for frontend scenarios ranging from routine to advanced.

The role sits with SME Careers, an AI data services company and a SuperAnnotate subsidiary that supports major AI companies and foundation model labs with training data. Your frontend knowledge will contribute to improving AI systems used by developers around the world.

Important Note

There is no active project attached to this opening right now. If you are a fit, you may be contacted first when a relevant assignment becomes available, and you may also be considered for future opportunities through the expert network.

Key Responsibilities

• Create high-quality prompts and reference answers centered on HTML and CSS topics to support AI training.
• Review and compare AI-generated responses, then rank them based on semantic correctness, accessibility, responsiveness, and visual accuracy.
• Check outputs for mistakes, weak reasoning, or unsafe guidance and confirm they hold up in realistic UI scenarios.
• Identify issues in semantic markup, layout systems such as Flexbox and Grid, responsive behavior, CSS architecture, specificity conflicts, and browser compatibility.
• Verify technical statements, produce clear explanations, and develop model solutions that reflect best practices.

Profile and Requirements

• A bachelor’s degree in Computer Science, Design, HCI, or a closely related area, or equivalent hands-on experience, is expected.
• At least 4 years of professional experience building production user interfaces with semantic HTML and modern CSS.
• Advanced working knowledge of CSS layout techniques, including Flexbox, Grid, responsive design patterns, and component-based styling.
• Strong accessibility awareness, covering semantic structure, ARIA fundamentals, keyboard navigation, focus handling, and WCAG-aware implementation.
• Solid understanding of browser behavior such as the box model, stacking contexts, positioning, rendering quirks, and cross-browser testing practices.
• Experience with maintainable CSS approaches, including naming conventions like BEM, design tokens, variables, theming, and preventing specificity conflicts.
• Familiarity with tools such as Sass, PostCSS, Tailwind, CSS Modules, or styled systems is beneficial, though the core focus remains accurate HTML/CSS implementation.
• Minimum C1-level English proficiency in both writing and speaking, with the ability to explain technical ideas clearly and follow detailed English instructions.
• Demonstrated ability to perform thorough code reviews and uphold UI quality standards for accessibility, responsiveness, and maintainability.
• Experience with AI data training, annotation, or assessment of AI-generated technical material will be considered a strong advantage.
• A careful, systematic mindset is important, along with the ability to spot subtle UI issues and judge reasoning quality in a structured way.

Work Arrangement

This is a fully remote contractor role paid on an hourly basis.

Additional Information

There is currently no immediate project assignment, but qualified candidates may be contacted when relevant work becomes available.