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 integrationsCraft responsive, accessible frontend interfaces designed for streaming responses and minimal latencyConstruct and sustain a library of reusable frontend components, hooks, and design systems for enterprise-grade GenAI applicationsBring LLM-based experiences to life using frameworks such as LangChain or LlamaIndex paired with OpenAI, Claude, or GeminiPartner with designers and product managers to quickly iterate on innovative AI UX patterns, including chat assistants, prompt builders, and feedback loopsGuarantee security, accessibility, observability, and thorough test coverage throughout client-side and full-stack buildsProduce responsive, accessible, and high-performance web UIs suited to AI-driven interactions like streaming text, prompt inputs, citations, and summariesSustain a shared library of reusable frontend components and hooks so internal teams can easily integrate GenAI capabilities into their own applicationsBuild 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 cases5–8 years of full-stack software engineering experience spanning frontend UIs, REST APIs, and microservices2+ years integrating GenAI features, LLM APIs, and prompt UI patterns into web-based applicationsSolid Python backend skills, along with 2+ years building and consuming cloud microservices on AWS, Docker, and REST APIsDemonstrated track record building, documenting, and maintaining reusable component libraries, design systems, and custom hooksEnglish 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 componentsUnderstanding of WCAG 2.1 AA compliance and how to architect accessible UI componentsHands-on skills with client-side or Node.js LangChain, LangGraph, or LlamaIndex orchestrationExposure to RAG pipelines, vector search platforms like Pinecone or OpenSearch, and embedding fundamentalsExperience with AI evaluation tools, feedback loop design, and interface-level guardrails We offer International projects with top brandsWork with global teams of highly skilled, diverse peersHealthcare benefitsEmployee financial programsPaid time off and sick leaveUpskilling, reskilling and certification coursesUnlimited access to the LinkedIn Learning library and 22,000+ coursesGlobal career opportunitiesVolunteer and community involvement opportunitiesEPAM Employee GroupsAward-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.