Lead Full-Stack Software Engineer

Description

Summary: Seeking a Lead Full-Stack Software Engineer to build user-friendly, high-performing interfaces and frontend integration libraries delivering GenAI and intelligent automation capabilities. Highlights: 1. Design and develop end-to-end GenAI-powered applications 2. Collaborate on innovative AI UX patterns 3. Develop UI components for transparency in AI outputs We're seeking a **Lead Full\-Stack Software Engineer** to build user\-friendly, high\-performing interfaces and frontend integration libraries that deliver GenAI and intelligent automation capabilities to teams across IT, HR, Finance, Sales, Marketing, and Customer Support. **Responsibilities** * Design and develop end\-to\-end GenAI\-powered applications, emphasizing intuitive web\-based UIs and high\-performing client\-side API integrations * Build responsive, accessible frontend interfaces tailored for streaming responses and minimal latency * Create and maintain a library of reusable frontend components, hooks, and design systems for enterprise\-grade GenAI applications * Deliver LLM\-based experiences using frameworks such as LangChain or LlamaIndex combined with OpenAI, Claude, or Gemini * Collaborate with designers and product managers to rapidly iterate on innovative AI UX patterns, including chat assistants, prompt builders, and feedback loops * Ensure security, accessibility, observability, and comprehensive test coverage across client\-side and full\-stack builds * Deliver responsive, accessible, and high\-performance web UIs suited to AI\-driven interactions such as streaming text, prompt inputs, citations, and summaries * Maintain a shared library of reusable frontend components and hooks so internal teams can seamlessly integrate GenAI capabilities into their own applications * Develop UI components that provide transparency, observability, and trust in AI\-generated outputs **Requirements** * Background in building production applications with React, TypeScript, or Vue for enterprise use cases (5\+ years) * Expertise in full\-stack software engineering spanning frontend UIs, REST APIs, and microservices (5–8 years) * Proficiency in integrating GenAI features, LLM APIs, and prompt UI patterns into web\-based applications (2\+ years) * Skills in Python backend development, along with 2\+ years building and consuming cloud microservices on AWS, Docker, and REST APIs * Showcase of building, documenting, and maintaining reusable component libraries, design systems, and custom hooks * Proficiency in English at a B2\+ level 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 to designing accessible UI components * Capability to work with client\-side or Node.js LangChain, LangGraph, or LlamaIndex orchestration * Understanding of RAG pipelines, vector search platforms like Pinecone or OpenSearch, and embedding fundamentals * Competency in 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