Lead Full-Stack Software Engineer

EPAM Systems; Colombia; On-site; COP 120,000,000 - 240,000,000; Full time

Benefits offered by this job

Healthcare benefits

Global career opportunities

Paid time off

Upskilling and certifications

LinkedIn Learning access

Volunteer opportunities

Job summary

EPAM Systems is seeking a Lead Full-Stack Software Engineer to build GenAI-powered frontend interfaces and integration libraries across enterprise teams. You will craft high‑performing UIs, design reusable components, and implement end‑to‑end AI experiences with OpenAI, Claude, or Gemini.

You will collaborate with designers and product managers to iterate AI UX patterns like chat assistants and prompt builders, while ensuring security and test coverage across client and full‑stack builds.

Qualifications

• 5+ years building production frontend UIs with React, TypeScript, or Vue.
• Proven experience with REST APIs and microservices in enterprise apps.
• Experience integrating GenAI features and LLM APIs in web apps.
• Strong backend Python and cloud deployment on AWS.

Responsibilities

• Design and develop GenAI-powered UIs and frontend integrations.
• Build responsive, accessible interfaces with low latency.
• Create reusable components, hooks, and design systems.
• Deliver LLM-based experiences using LangChain and LlamaIndex.
• Collaborate with design and product teams to iterate on AI UX patterns.
• Ensure security, accessibility, observability, and tests across stack.
• Maintain a library of components for internal GenAI capabilities.
• Develop UI components that provide transparency and trust in AI outputs.

Skills

React

TypeScript

Vue

REST APIs

Microservices

GenAI integration

Python backend

AWS

Docker

English (B2+)

Tools

LangChain

LlamaIndex

OpenAI API

Job description

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'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

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.