Frontend Engineer - AI Platform (Remote UK)

System1 is building the world’s leading AI-powered platform to predict and improve advertising effectiveness. We seek a talented frontend software engineer to join as the first frontend specialist on the platform, shaping architecture, UI patterns and design systems while delivering scalable interfaces for video uploads, analytics, and AI agents.

You’ll work closely with Product Manager, Designer and Team Lead to ship fast, robust features, pursue accessible, high-performance interfaces, and own