Senior 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 hiring a Senior Full Stack Software Engineer to build fast, intuitive web interfaces and frontend integration libraries for GenAI and intelligent automation. You will deliver accessible, low-latency UI patterns and reusable components while connecting to LLM APIs and cloud microservices.
Responsibilities
Design and deliver end-to-end GenAI-powered applications with an emphasis on intuitive web UIs and efficient client-side API integrations
Build responsive, accessible frontend experiences optimized for streaming responses and low latency
Develop and maintain reusable frontend component libraries, hooks, and design systems for enterprise GenAI apps
Implement LLM-driven experiences using frameworks such as LangChain or LlamaIndex together with OpenAI, Claude, or Gemini
Collaborate with designers and product managers to iterate quickly on AI UX patterns like chat assistants, prompt builders, and feedback loops
Ensure security, accessibility, observability, and robust test coverage across client-side and full-stack work
Create high-performance, accessible web UIs for AI interactions including streaming text, prompt inputs, citations, and summaries
Maintain shared libraries of reusable frontend components and hooks to help internal teams embed GenAI capabilities into their applications
Build UI components that provide transparency, observability, and trust in AI-generated outputs
Requirements
3+ years of experience building production apps with React, TypeScript, or Vue for enterprise use cases
Solid full-stack software engineering background across frontend UIs, REST APIs, and microservices
Practical experience integrating GenAI features, LLM APIs, and prompt UI patterns into web-based applications
Strong Python backend skills, plus experience building and consuming cloud microservices on AWS, Docker, and REST APIs
Proven track record creating, documenting, and maintaining reusable component libraries, design systems, and custom hooks
English proficiency at a B2+ level (Upper-Intermediate) or higher
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 approaches for architecting accessible UI components
Practical experience 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