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
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
EPAM is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity or expression, disability, protected veteran status, or any other characteristic protected by applicable law.

Work arrangement
Yes