Lead Full Stack Software Engineer

We're looking for a Lead Full Stack Software Engineer to create user-friendly, high-performing interfaces and frontend integration libraries that bring GenAI and intelligent automation capabilities to teams across IT, HR, Finance, Sales, Marketing, and Customer Support.

Responsibilities

• Architect and develop complete GenAI-powered applications, with a focus on intuitive web-based UIs and high-performing client-side API integrations
• Craft responsive, accessible frontend interfaces designed for streaming responses and minimal latency
• Construct and sustain a library of reusable frontend components, hooks, and design systems for enterprise-grade GenAI applications
• Bring LLM-based experiences to life using frameworks such as LangChain or LlamaIndex paired with OpenAI, Claude, or Gemini
• Partner with designers and product managers to quickly iterate on innovative AI UX patterns, including chat assistants, prompt builders, and feedback loops
• Guarantee security, accessibility, observability, and thorough test coverage throughout client-side and full-stack builds
• Produce responsive, accessible, and high-performance web UIs suited to AI-driven interactions like streaming text, prompt inputs, citations, and summaries
• Sustain a shared library of reusable frontend components and hooks so internal teams can easily integrate GenAI capabilities into their own applications
• Build UI components that offer transparency, observability, and trust in AI-generated outputs

Requirements

• 5+ years building production applications with React, TypeScript, or Vue for enterprise use cases
• 5–8 years of full-stack software engineering experience spanning frontend UIs, REST APIs, and microservices
• 2+ years integrating GenAI features, LLM APIs, and prompt UI patterns into web-based applications
• Solid Python backend skills, along with 2+ years building and consuming cloud microservices on AWS, Docker, and REST APIs
• Demonstrated track record building, documenting, and maintaining reusable component libraries, design systems, and custom hooks
• English proficiency at a B2+ level or higher

Nice to have

• Experience with real-time streaming UX patterns, including SSE/WebSockets, prompt builders, citations, and summary UI components
• Understanding of WCAG 2.1 AA compliance and how to architect accessible UI components
• Hands-on skills with client-side or Node.js LangChain, LangGraph, or LlamaIndex orchestration
• Exposure to RAG pipelines, vector search platforms like Pinecone or OpenSearch, and embedding fundamentals
• Experience with AI evaluation tools, feedback loop design, and interface-level guardrails

Benefits

• 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