Front-EndEngineer

Own the front-end architecture for the next generation of AWS Holmes, AWS's GenAI-powered content quality platform. You'll build production interfaces in React and TypeScript on the AWS Cloudscape Design System, turning agentic prototypes into self-service rubric management workflows and human-in-the-loop evaluation experiences that serve builders across the company. Holmes processes over 10 million scans annually, and this role leads the UI work that brings rubric creation, testing, and publishing directly to program owners at Amazon scale. Key job responsibilities - Lead front-end development for the next generation of Holmes, building a scalable rubric management platform in React and TypeScript on the AWS Cloudscape Design System - Transform CDS agent pattern prototypes into production-grade, accessible UI frames - conversational rubric creation, interactive rule testing, and guided workflows - Build self-service rubric management: end-to-end creation, rule editing with live preview, draft/publish lifecycle, evaluation dashboards, and scan report previews - Design human-in-the-loop evaluation surfaces: diff-style content mutation views, batch review interfaces, and feedback collection that drives rubric improvement - Deliver platform UX for program integrations: simplified scan workflows, finding annotations, collaborative sharing, team permissions, and real-time scan status - Own front-end operational excellence: performance monitoring, accessibility compliance , CloudWatch RUM instrumentation, and cross-browser validation A day in the life You work with product managers to understand customer experiences and translate requirements into solutions. You create interactive prototypes and participate in user research sessions to validate design decisions early. You write HLD and spec documents for new features, align with backend engineers on API contracts, and implement production components in React and TypeScript. You attend team operational excellence sessions