Lead GenAI Frontend Engineer — UI & Design Systems

EPAM Systems, Inc.; United States; Remote; USD 150,000 - 190,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off and sick leave

Upskilling, reskilling and courses

LinkedIn Learning access

Global career opportunities

Volunteer opportunities

Employee Groups

Job summary

EPAM Systems, Inc. is seeking a Lead Full Stack Software Engineer to design and build GenAI-powered applications with intuitive, high-performance web UIs and robust frontend integration libraries.

You will create streaming-capable interfaces, develop reusable components and design systems, and implement LLM-based experiences with LangChain, LlamaIndex, and major AI providers. You will collaborate with designers and product managers to iterate AI UX patterns such as chat assistants, prompt

Qualifications

• 5+ years of production experience with React, TypeScript, or Vue for enterprise web applications.
• 5–8 years of software engineering across the full web stack (frontend, REST APIs, microservices).
• 2+ years of integrating GenAI features, LLM APIs, and prompt UI patterns.
• Strong Python backend development skills; 2+ years building cloud microservices on AWS, Docker, REST APIs.
• Proven experience building, documenting, and maintaining reusable component libraries, design systems, and hooks.
• Proficiency in English at a B2+ level.

Responsibilities

• Design and build end-to-end GenAI-powered applications with intuitive web UIs.
• Develop responsive frontend interfaces for streaming responses and low latency.
• Maintain a library of reusable frontend components, hooks, and design systems.
• Implement LLM-based experiences using LangChain/LlamaIndex with OpenAI, Claude, or Gemini.
• Collaborate with design and product teams to iterate AI UX patterns (chat assistants, prompt builders).
• Ensure security, accessibility, observability, and test coverage across client-side and full-stack.
• Create UI components that provide transparency and confidence in AI outputs.
• Deliver UI components for drop-in GenAI capabilities across internal apps.

Skills

React

TypeScript

Vue

GenAI APIs

Python

English (B2+)

Tools

LangChain

LangGraph

LlamaIndex

OpenAI

Claude

Gemini

Pinecone

OpenSearch

AWS

Docker

REST APIs

Job description

EPAM Systems, Inc. is seeking a Lead Full Stack Software Engineer to design and build GenAI-powered applications with intuitive, high-performance web UIs and robust frontend integration libraries.

You will create streaming-capable interfaces, develop reusable components and design systems, and implement LLM-based experiences with LangChain, LlamaIndex, and major AI providers. You will collaborate with designers and product managers to iterate AI UX patterns such as chat assistants, prompt