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

Role overview Apply practical frontend engineering judgment to tasks that train and evaluate AI systems. The work focuses on whether generated HTML and CSS is correct, accessible, maintainable, and visually effective, as well as whether the model can explain its implementation choices. Entry to the participant network follows a short skills assessment.

Responsibilities - Inspect generated frontend code for correctness, semantics, and adherence to sound implementation practices. - Review the explanations accompanying layout and styling suggestions for technical accuracy. - Render the code and verify the resulting interface, including cross-browser presentation where relevant. - Record problems such as inaccessible elements, poor selector choices, outdated attributes, and invalid CSS. - Provide structured guidance on responsive layouts, component design, and design system implementation.

Requirements - A bachelor’s degree or higher in a relevant area, such as computer science, software engineering, or web development. - Professional experience in a senior frontend or UI engineering role with HTML and CSS as core areas of expertise. - Ability to implement sophisticated, responsive layouts and components from first principles. - Expert grasp of the cascade, specificity, box model, Flexbox, Grid, WCAG accessibility requirements, and browser differences. - High standards for semantic HTML and readable, maintainable CSS, including familiarity with BEM conventions and design tokens. - Strong modern HTML/CSS skills; relevant supporting experience includes Sass/SCSS, Tailwind, CSS Modules, DevTools, accessibility checkers, and cross-browser testing services.

Benefits and work setup The initial assessment takes approximately 10–15 minutes. Paid work is offered through individual tasks, with potential rates up to $40 per hour depending on experience and skill fit. Some tasks require an uninterrupted hour, although shorter ones are also available. The arrangement is presented as flexible and remote.