> Markdown version of [/jobs/ext/4643834-remote-frontend-engineer-ai-ui-quality-performance](https://www.wearedevelopers.com/jobs/ext/4643834-remote-frontend-engineer-ai-ui-quality-performance). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Remote Frontend Engineer - AI UI Quality & Performance - **Company:** Synthires - **Location:** Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Software Debugging, Web Applications, ReactJS, AI Coding Agents, Vue.js, AngularJS, Front End Software Development - **Published:** November 9, 2026 - **Apply:** https://www.jobleads.com/es/job/remote-frontend-engineer-ai-ui-quality-performance--spain--e205b5fb03685ce1bd38af9e9752a0fb0 ## About the Role Required are strong skills in HTML/CSS, React/Angular/Vue, and pixel-accurate UI delivery. You will build and review responsive interfaces, debug issues, and provide actionable feedback to AI coding tools. ## Description Synthires is seeking a frontend engineer to assess AI-generated frontend code, UI implementations, and web applications. You will work on improving accuracy, UI quality, and overall frontend performance in a fully remote setup. Required are strong skills in HTML/CSS, React/Angular/Vue, and pixel-accurate UI delivery. You will build and review responsive interfaces, debug issues, and provide actionable feedback to AI coding tools.