Lead JavaScript Full-Stack Engineer

EPAM Systems; Colombia; On-site; COP 120,000,000 - 180,000,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off

Sick leave

Upskilling & certification courses

LinkedIn Learning access

Global career opportunities

Volunteer opportunities

Award-winning culture

Job summary

EPAM Systems in Colombia is seeking a Lead JavaScript Full-Stack Engineer to join our global AI Engineering team and shape the architecture of enterprise-grade AI agent interfaces.

You will mentor engineers, define frontend and backend patterns, and collaborate with multi-national teams to deliver real-time streaming experiences and reusable SDKs.

This role offers international projects, generous benefits, and opportunities to grow within a diverse, inclusive culture.

Qualifications

• 5+ years of engineering expertise in JavaScript, React, TypeScript, and modern frontend state management libraries.
• At least 1 year of relevant leadership experience.
• Strong software development experience across web applications, client-side SDKs, APIs, and microservices.
• Background in building GenAI user experiences, conversational UX, and real-time response streaming interfaces (SSE/WebSockets).
• Proficiency in Python backend development and integrating cloud-native REST APIs on AWS/Docker.

Responsibilities

• Set technical direction for frontend architectures, component systems, and real-time streaming interfaces powering AI agents across web and mobile.
• Build high-performance frontend interfaces engineered for low latency, SSE/WebSocket streaming, and complex AI interaction patterns.
• Mentor senior full-stack engineers and partner with global cross-geo teams to ensure shared component libraries and cohesive AI design standards.
• Design, build, and refine frontend interfaces and SDKs that bring AI agent capabilities to life for employees and customers.
• Architect high-performance Agentic Experiences (AX) for web and mobile, engineered for real-time response streaming and low latency.
• Champion frontend observability, accessibility (WCAG/a11y), and operational excellence across user-facing AI services.
• Develop reusable full-stack integration frameworks and component hooks that enable enterprise teams to easily embed GenAI tools.
• Partner with product managers, UX designers, and backend engineers to define novel interaction patterns for AI copilots and virtual agents.
• Provide technical leadership and hands-on guidance to global delivery teams across multiple regions.

Skills

JavaScript

React

TypeScript

Frontend state management

Leadership

Tools

Python

AWS

Docker

REST APIs

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 are seeking a Lead JavaScript Full-Stack Engineer to join our global AI Engineering team and build the future of secure, enterprise-grade AI Agents.
In this role, you will lead the architecture and design of intelligent, user-facing agentic interfaces, frontend libraries, and streaming UX platforms that bring GenAI capabilities to employees and customers worldwide.

Responsibilities

• Set technical direction for frontend architectures, component systems, and real-time streaming interfaces powering AI agents across web and mobile
• Build high-performance frontend interfaces engineered for low latency, SSE/WebSocket streaming, and complex AI interaction patterns
• Mentor senior full-stack engineers and partner with global cross-geo teams to ensure shared component libraries and cohesive AI design standards
• Design, build, and refine frontend interfaces and SDKs that bring AI agent capabilities to life for employees and customers
• Architect high-performance Agentic Experiences (AX) for web and mobile, engineered for real-time response streaming and low latency
• Champion frontend observability, accessibility (WCAG/a11y), and operational excellence across user-facing AI services
• Develop reusable full-stack integration frameworks and component hooks that enable enterprise teams to easily embed GenAI tools
• Partner with product managers, UX designers, and backend engineers to define novel interaction patterns for AI copilots and virtual agents
• Provide technical leadership and hands-on guidance to global delivery teams across multiple regions

Requirements

• 5+ years of engineering expertise in JavaScript, React, TypeScript, and modern frontend state management libraries
• At least 1 year of relevant leadership experience
• Strong software development experience across web applications, client-side SDKs, APIs, and microservices
• Background in building GenAI user experiences, conversational UX, and real-time response streaming interfaces (SSE/WebSockets)
• Skills in developing chat assistants and prompt UI patterns
• Proficiency in Python backend development and integrating cloud-native REST APIs on AWS/Docker
• Showcase of architecting enterprise UI component libraries, design systems, and developer SDKs for multi-team consumption
• Excellent command of written and spoken English (B2+ level)

Nice to have

• Familiarity with client-side or Node.js orchestration frameworks (LangChain for JavaScript, LlamaIndex, Model Context Protocol)
• Understanding of RAG retrieval, vector databases, and citation rendering
• Knowledge of React Native or web-to-mobile wrapper experience for AI workflows
• Expertise in WCAG 2.1 AA compliance, a11y standards, and accessible UI component architecture
• Competency in GraphQL and AI evaluation tooling (LangSmith, Langfuse, or user feedback loop UI components)

We offer

• International projects with top brands
• Work with global teams of highly skilled, diverse peers
• Healthcare benefits
• Employee financial programsPaid 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.