Lead GenAI Full-Stack Engineer: UI/API Expert

EPAM Systems; Argentina; Hybrid; ARS 2,000,000 - 4,000,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off

Upskilling and certifications

LinkedIn Learning access

Global career opportunities

Volunteer opportunities

Job summary

EPAM Systems is seeking a Lead Full-Stack Software Engineer to build GenAI-powered interfaces and frontend integration libraries for teams across IT, HR, Finance, Sales, Marketing, and Support.

You will design end-to-end GenAI apps, create reusable UI components and design systems, and deliver LLM-based experiences using LangChain or LlamaIndex with major providers. Strong frontend and backend full-stack skills are required.

Qualifications

• 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).
• Python backend development 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.

Responsibilities

• Design and develop end-to-end GenAI-powered applications with intuitive web UIs and client-side integrations.
• Build responsive, accessible frontend interfaces for streaming responses and low latency.
• Create reusable frontend components, hooks, and design systems for enterprise GenAI apps.
• Deliver LLM-based experiences using LangChain or LlamaIndex with OpenAI, Claude, or Gemini.
• Collaborate with designers and PMs to iterate AI UX patterns like chat assistants and prompt builders.
• Ensure security, accessibility, observability, and test coverage across client-side and full-stack builds.
• Deliver high-performance UIs for AI-driven interactions such as streaming text and citations.
• Maintain a shared library of components and hooks for internal GenAI integrations.
• Develop UI components that provide transparency and trust in AI outputs.

Skills

React

TypeScript

Vue

Full-stack

REST APIs

Microservices

GenAI

LLM APIs

Prompt UI

Python

AWS

Docker

Component libraries

Design systems

Custom hooks

English proficiency

Tools

LangChain

LlamaIndex

Job description

EPAM Systems is seeking a Lead Full-Stack Software Engineer to build GenAI-powered interfaces and frontend integration libraries for teams across IT, HR, Finance, Sales, Marketing, and Support.

You will design end-to-end GenAI apps, create reusable UI components and design systems, and deliver LLM-based experiences using LangChain or LlamaIndex with major providers. Strong frontend and backend full-stack skills are required.