Lead Fullstack Developer (JavaScript)

EPAM Systems; United States; Hybrid; USD 120,000 - 160,000; Full time

Job summary

EPAM Systems is seeking a Lead Fullstack Developer to shape architectural decisions and deliver enterprise-grade solutions. You will collaborate with product owners and cross-functional teams across regions, turning ambiguous requirements into concrete backlogs and pragmatic designs.

You will drive AI/LLM solution delivery, integrate with platforms like Salesforce and ServiceNow, and ensure secure, observable, and scalable implementations for production.

Qualifications

• Five-plus years of practical, relevant full-stack engineering experience.
• Minimum one year of experience directing and overseeing development teams.
• Deep proficiency in TypeScript/JavaScript combined with a contemporary frontend framework such as React or equivalent.
• Strong backend engineering background using Node.js or Python, with API and integration architecture.
• Proven track record delivering AI/LLM solutions, spanning tool calling, RAG, agent systems, MCP, prompt workflows, or similar production-grade experience.

Responsibilities

• Work in close coordination with product owners and stakeholders spanning IT, Sales, Finance, and HR, matching schedules to enable live collaboration.
• Turn ambiguous internal use cases into concrete architecture plans, UX/flow designs, API specifications, and a ready-to-build backlog for the team based in India.
• Architect and connect agentic workflows spanning enterprise platforms including Salesforce, ServiceNow, Jira, Glean, and Oracle HCM.
• Drive resolution of intricate integration work, spanning authentication setup, MCP tool access, data contract definition, RBAC design, error handling, and production go-live.
• Engage daily with the India-based team, clearing up requirements, conducting PR reviews, removing integration roadblocks, and ensuring release quality holds.
• Develop prototypes where necessary, spanning UI work, agent flow design, or MCP/LLM implementation, then pass a production-ready backlog over to the India team.
• Bake security, observability, and reusability into the build approach so each agent stands as a lasting solution rather than a throwaway demo.

Skills

Full-stack engineering

Team leadership

TypeScript/JavaScript

React

Node.js

Python

AWS

AI/LLM solutions

API design

RBAC/SSO

OpenTelemetry

Tools

React

Node.js

Python

AWS

OpenTelemetry

Salesforce

ServiceNow

Job description

We're on the hunt for a Lead Fullstack Developer to become part of our team. This position sits at the intersection of business objectives and hands-on technical delivery within a spread-out, multi-functional organization. You'll apply disciplined engineering thinking to fast-paced, often undefined challenges, all while influencing how new technologies get adopted across the company. It's a chance to leave a real mark on how enterprise systems grow and interconnect.

Responsibilities

• Work in close coordination with product owners and stakeholders spanning IT, Sales, Finance, and HR, matching schedules to enable live collaboration
• Turn ambiguous internal use cases into concrete architecture plans, UX/flow designs, API specifications, and a ready-to-build backlog for the team based in India
• Architect and connect agentic workflows spanning enterprise platforms including Salesforce, ServiceNow, Jira, Glean, and Oracle HCM
• Drive resolution of intricate integration work, spanning authentication setup, MCP tool access, data contract definition, RBAC design, error handling, and production go-live
• Engage daily with the India-based team, clearing up requirements, conducting PR reviews, removing integration roadblocks, and ensuring release quality holds
• Develop prototypes where necessary, spanning UI work, agent flow design, or MCP/LLM implementation, then pass a production-ready backlog over to the India team
• Bake security, observability, and reusability into the build approach so each agent stands as a lasting solution rather than a throwaway demo

Requirements

• Five-plus years of practical, relevant full-stack engineering experience, with current, hands-on delivery track record
• Minimum one year of experience directing and overseeing development teams
• Deep proficiency in TypeScript/JavaScript combined with a contemporary frontend framework such as React or equivalent
• Strong backend engineering background using Node.js or Python, coupled with solid skills in API and integration architecture
• Proven track record delivering AI/LLM solutions, spanning tool calling, RAG, agent systems, MCP, prompt workflows, or similar production-grade experience
• Experience converting stakeholder workshop outcomes into tangible architecture and a workable, buildable backlog
• Hands-on AWS delivery background, covering Lambda, API Gateway, ECS/EKS, S3, RDS/DynamoDB, IAM, and CloudWatch, plus enterprise authentication approaches like SSO/Okta and RBAC
• Skilled communicator capable of driving technical dialogue in English with US-based stakeholders, holding working fluency at B2 level or higher, converting business needs into agentic system designs
• Nice to have Knowledge of MCP gateways, LLM gateways, model routing, policy/audit frameworks, and usage/cost management tools
• Background applying OpenTelemetry or comparable observability solutions to monitor agent traces, tool calls, latency, and failures
• Experience working within platforms such as Salesforce, Gong, Clari, Glean, ServiceNow, Oracle HCM, Concur, or similar HR/IT tools
• Track record transforming internal platforms or prototypes into robust, enterprise-grade production services