Lead JavaScript Full-Stack Engineer

Description

Summary: Seeking a Lead JavaScript Full-Stack Engineer to architect and design intelligent, user-facing agentic interfaces and streaming UX platforms for enterprise-grade AI Agents. Highlights: 1. Lead architecture for AI agent interfaces across web and mobile 2. Mentor senior full-stack engineers and partner with global cross-geo teams 3. Develop reusable full-stack integration frameworks for GenAI tools We are seeking a **Lead JavaScript Full\-Stack Engineer** to join our global AI Engineering team and build the future of secure, enterprise\-grade AI Agents. In this role, you will lead the architecture and design of intelligent, user\-facing agentic interfaces, frontend libraries, and streaming UX platforms that bring GenAI capabilities to employees and customers worldwide. **Responsibilities** * Set technical direction for frontend architectures, component systems, and real\-time streaming interfaces powering AI agents across web and mobile * Build high\-performance frontend interfaces engineered for low latency, SSE/WebSocket streaming, and complex AI interaction patterns * Mentor senior full\-stack engineers and partner with global cross\-geo teams to ensure shared component libraries and cohesive AI design standards * Design, build, and refine frontend interfaces and SDKs that bring AI agent capabilities to life for employees and customers * Architect high\-performance Agentic Experiences (AX) for web and mobile, engineered for real\-time response streaming and low latency * Champion frontend observability, accessibility (WCAG/a11y), and operational excellence across user\-facing AI services * Develop reusable full\-stack integration frameworks and component hooks that enable enterprise teams to easily embed GenAI tools * Partner with product managers, UX designers, and backend engineers to define novel interaction patterns for AI copilots and virtual agents * Provide technical leadership and hands\-on guidance to global delivery teams across multiple regions **Requirements** * 5\+ years of engineering expertise in JavaScript, React, TypeScript, and modern frontend state management libraries * At least 1 year of relevant leadership experience * Strong software development experience across web applications, client\-side SDKs, APIs, and microservices * Background in building GenAI user experiences, conversational UX, and real\-time response streaming interfaces (SSE/WebSockets) * Skills in developing chat assistants and prompt UI patterns * Proficiency in Python backend development and integrating cloud\-native REST APIs on AWS/Docker * Showcase of architecting enterprise UI component libraries, design systems, and developer SDKs for multi\-team consumption * Excellent command of written and spoken English (B2\+ level) **Nice to have** * Familiarity with client\-side or Node.js orchestration frameworks (LangChain for JavaScript, LlamaIndex, Model Context Protocol) * Understanding of RAG retrieval, vector databases, and citation rendering * Knowledge of React Native or web\-to\-mobile wrapper experience for AI workflows * Expertise in WCAG 2\.1 AA compliance, a11y standards, and accessible UI component architecture * Competency in GraphQL and AI evaluation tooling (LangSmith, Langfuse, or user feedback loop UI components) **We offer** * International projects with top brands * Work with global teams of highly skilled, diverse peers * Healthcare benefits * Employee financial programs * Paid time off and sick leave * Upskilling, reskilling and certification courses * Unlimited access to the LinkedIn Learning library and 22,000\+ courses * Global career opportunities * Volunteer and community involvement opportunities * EPAM Employee Groups * Award\-winning culture recognized by Glassdoor, Newsweek and LinkedIn