Lead Full Stack Software Engineer

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

We are seeking a Lead Full Stack Software Engineer to build intuitive, performant user interfaces and frontend integration libraries that make GenAI and intelligent automation accessible and useful across IT, HR, Finance, Sales, Marketing, and Customer Support.

Responsibilities

Design and build end-to-end GenAI-powered applications, emphasizing intuitive web-based UIs and performant client-side API integrations

Develop responsive, accessible frontend interfaces engineered for streaming responses and low latency

Build and maintain a library of reusable frontend components, hooks, and design systems for enterprise GenAI applications

Implement LLM-based experiences using frameworks like LangChain or LlamaIndex with OpenAI, Claude, or Gemini

Collaborate with designers and product managers to iterate rapidly on novel AI UX patterns such as chat assistants, prompt builders, and feedback loops

Ensure security, accessibility, observability, and test coverage across client-side and full-stack implementations

Create responsive, accessible, and high-performance web UIs tailored for AI-driven interaction patterns like streaming text, prompt inputs, citations, and summaries

Maintain a shared library of reusable frontend components and hooks that enable internal teams to drop GenAI capabilities into their applications

Deliver UI components that provide transparency, observability, and confidence in AI-generated outputs

Requirements

5+ years of production experience with React, TypeScript, or Vue for enterprise web applications

5–8 years of software engineering experience across the full web stack, including frontend UIs, REST APIs, and microservices

2+ years of experience integrating GenAI features, LLM APIs, and prompt UI patterns into web applications

Strong Python backend development skills and 2+ years of experience consuming and building cloud microservices on AWS, Docker, and REST APIs

Proven experience building, documenting, and maintaining reusable component libraries, design systems, and custom hooks

Proficiency in English at a B2+ level

Nice to have

Familiarity with real-time streaming UX patterns such as SSE/WebSockets, prompt builders, citations, and summary UI components

Knowledge of WCAG 2.1 AA compliance and accessible UI component architecture

Skills in client-side or Node.js LangChain, LangGraph, or LlamaIndex orchestration

Familiarity with RAG pipelines, vector search tools like Pinecone or OpenSearch, and embedding concepts

Background in AI evaluation tooling, feedback loops, and guardrails in user interfaces

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.

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