HTML/CSS - Senior Developers - AI Training - Oxford, UK

Role overview Support the development of AI through paid evaluations of frontend code and reasoning. The role suits an experienced HTML/CSS specialist who can judge implementation quality, reproduce the rendered result, and communicate precise corrections. A brief technical assessment is used before candidates can join the pool for potential tasks.

Responsibilities - Judge generated HTML and CSS for working behaviour, meaningful structure, and maintainable implementation. - Check the model’s written reasoning about layout and styling for accuracy and sound technique. - Render generated pages or components and inspect their visual output and browser compatibility. - Mark accessibility concerns, inefficient styling, obsolete markup, and CSS declarations that are not valid. - Offer actionable feedback on responsive design decisions, component architecture, and design-system use.

Requirements - Degree-level education or higher in computer science, software engineering, web development, or a similar field. - Hands-on senior frontend development or UI engineering experience specialising in HTML and CSS. - Skill in building complex responsive interfaces and components without relying on a framework or library. - Advanced knowledge of CSS cascade and specificity, the box model, Flexbox, Grid, WCAG, and cross-browser support. - Strong commitment to semantic markup and clear, sustainable CSS, with knowledge of BEM and design tokens. - Expertise in modern HTML and CSS; familiarity with Tailwind, Sass/SCSS, CSS Modules, browser developer tools, accessibility auditing, or compatibility testing is useful.

Benefits and work setup A 10–15 minute skills test precedes consideration for tasks. Project rates may reach $40 per hour depending on expertise, and work is paid by task. Some assignments call for one uninterrupted hour, but many are shorter. The opportunity is described as flexible and remote, subject to task availability.