Senior Full Stack Software Engineer

EPAM Systems; Colombia; On-site; COP 133,920,000 - 200,880,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off

Upskilling and certification courses

Global career opportunities

Job summary

EPAM Systems is seeking a Senior Full Stack Software Engineer to build fast, intuitive web interfaces and frontend integration libraries for GenAI and intelligent automation. You will deliver accessible, low-latency UI patterns and reusable components while connecting to LLM APIs and cloud microservices.

The role emphasizes end-to-end GenAI-powered applications, collaboration with cross-functional teams, and maintaining robust security and accessibility standards in enterprise environments.

Qualifications

• 3+ years building production apps with React/TypeScript or Vue.
• Full-stack experience with frontend UIs, REST APIs, and microservices.
• Experience integrating GenAI features and LLM APIs into web apps.

Responsibilities

• Design and deliver GenAI-powered, frontend-focused applications.
• Build responsive, accessible UIs optimized for low latency and streaming responses.
• Develop reusable frontend component libraries and design systems.
• Implement LLM-driven experiences using frameworks and OpenAI/GPT APIs.
• Collaborate with designers and PMs to iterate on AI UX patterns like chat and prompts.
• Ensure security, accessibility, observability, and test coverage across client-side and full-stack work.
• Create high-performance UIs for AI interactions including streaming text and summaries.
• Maintain shared libraries of reusable components for GenAI capabilities.

Skills

React

TypeScript

Vue

REST APIs

GenAI integration

LLM APIs

Python

Tools

AWS

Docker

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 hiring a Senior Full Stack Software Engineer to build fast, intuitive web interfaces and frontend integration libraries for GenAI and intelligent automation. You will deliver accessible, low-latency UI patterns and reusable components while connecting to LLM APIs and cloud microservices.

Responsibilities

• Design and deliver end-to-end GenAI-powered applications with an emphasis on intuitive web UIs and efficient client-side API integrations
• Build responsive, accessible frontend experiences optimized for streaming responses and low latency
• Develop and maintain reusable frontend component libraries, hooks, and design systems for enterprise GenAI apps
• Implement LLM-driven experiences using frameworks such as LangChain or LlamaIndex together with OpenAI, Claude, or Gemini
• Collaborate with designers and product managers to iterate quickly on AI UX patterns like chat assistants, prompt builders, and feedback loops
• Ensure security, accessibility, observability, and robust test coverage across client-side and full-stack work
• Create high-performance, accessible web UIs for AI interactions including streaming text, prompt inputs, citations, and summaries
• Maintain shared libraries of reusable frontend components and hooks to help internal teams embed GenAI capabilities into their applications
• Build UI components that provide transparency, observability, and trust in AI-generated outputs

Requirements

• 3+ years of experience building production apps with React, TypeScript, or Vue for enterprise use cases
• Solid full-stack software engineering background across frontend UIs, REST APIs, and microservices
• Practical experience integrating GenAI features, LLM APIs, and prompt UI patterns into web-based applications
• Strong Python backend skills, plus experience building and consuming cloud microservices on AWS, Docker, and REST APIs
• Proven track record creating, documenting, and maintaining reusable component libraries, design systems, and custom hooks
• English proficiency at a B2+ level (Upper-Intermediate) 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 for architecting accessible UI components
• Practical experience with client-side or Node.js LangChain, LangGraph, or LlamaIndex orchestration
• Exposure to RAG pipelines, vector search platforms like Pinecone or OpenSearch, and embedding fundamentals
• Experience with 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.