Senior Front-End Engineer, Generative AI Applications

Cross River

full-time

Posted on: 9/25/2025

Origin: • 🇮🇱 Israel

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Senior

GraphQLJavaScriptJestNext.jsReactReduxTypeScript

About the role

Design and implement responsive web applications using React (Next.js) and TypeScript that surface chat, summarization, and creative‑assist features powered by LLMs
Integrate securely with backend GenAI APIs (REST/GraphQL, WebSocket) and handle real‑time streaming of model responses
Build reusable UI components (TailwindCSS/shadcn/ui) and design systems for prompt inputs, context panes, and feedback collectors
Implement client‑side observability (OpenTelemetry, Sentry) to monitor latency, errors, and usability of GenAI features
Optimize performance through code‑splitting, server‑side rendering (SSR), and efficient state management (React Query, Zustand, or Redux Toolkit)
Collaborate with product designers and ML/backend engineers to iterate on prompt engineering, UI/UX flows, and evaluation loops
Champion accessibility (WCAG 2.1 AA), localization, and responsive design to reach global audiences

Available working some US hours
Proficient in Hebrew and English both written and verbal
4+ years professional experience building modern web applications with React or similar frameworks
Strong TypeScript skills and deep understanding of component architecture, hooks, and state management patterns
Experience integrating with REST and GraphQL APIs; familiarity with real‑time protocols (WebSocket, SSE)
Hands‑on exposure to LLM‑based products or services
Proficiency with CSS‑in‑JS or utility‑first frameworks (TailwindCSS) and responsive design best practices
Working knowledge of CI/CD pipelines (GitHub Actions), automated testing (Jest, Playwright), and performance tooling (Lighthouse, Web Vitals)