Lead JavaScript Full-Stack Engineer

About the Position

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

Skills

• JavaScript (Frontend)
• Conversational UX
• Python
• REST API
• ReactJS
• TypeScript
• A11y Standards knowledge and understanding
• GraphQL
• LangChain for JavaScript
• LlamaIndex
• Model Context Protocol
• React Native
• Vector Databases