Senior Fullstack Developer (JavaScript)

We are looking for a Senior Fullstack Developer to join our team. In this role, you'll bridge business needs with technical execution across a distributed, cross-functional environment. You'll bring engineering rigor to fast-moving, ambiguous problems while helping shape how emerging technologies are adopted at scale. This is an opportunity to make a tangible impact on how enterprise systems evolve and connect. Responsibilities Coordinate closely with product owners and stakeholders across IT, Sales, Finance, and HR, aligning working hours to support real-time collaboration Convert loosely defined internal use cases into clear architecture, UX/flow design, API contracts, and a development-ready backlog for the India-based team Design and integrate agentic workflows connecting enterprise systems such as Salesforce, ServiceNow, Jira, Glean, and Oracle HCM Take ownership of complex integration challenges, including authentication, MCP tool access, data contracts, RBAC configuration, error handling, and production cutover Collaborate daily with the India-based pod, clarifying requirements, reviewing pull requests, resolving integration blockers, and safeguarding release quality Build prototypes as needed, covering UI, agent flow, or MCP/LLM paths, then transition a production-ready backlog to the India team Factor in security, observability, and reusability throughout the build process so each agent becomes a durable asset rather than a one-off demo Requirements 3+ years of hands-on, relevant experience as a full-stack engineer, with recent, active delivery work Strong command of TypeScript/JavaScript paired with a modern frontend framework such as React or similar Solid backend development experience using Node.js or Python, along with strong API and integration design skills Demonstrated experience delivering AI/LLM-powered solutions, covering tool calling, RAG, agents, MCP, prompt workflows, or comparable production work Background translating stakeholder workshop discussions into concrete architecture and an actionable, buildable backlog Practical AWS delivery experience, including Lambda, API Gateway, ECS/EKS, S3, RDS/DynamoDB, IAM, and CloudWatch, along with enterprise authentication methods such as SSO/Okta and RBAC Confident communicator able to lead technical discussions in English with US-based stakeholders, with working fluency at B2 level or higher, translating business requirements into agentic architectures Nice to have Familiarity with MCP gateways, LLM gateways, model routing, policy/audit mechanisms, and usage/cost control systems Experience with OpenTelemetry or similar observability tools for tracking agent traces, tool calls, latency, and failure points Background working with platforms such as Salesforce, Gong, Clari, Glean, ServiceNow, Oracle HCM, Concur, or similar HR/IT systems Experience hardening internal platforms or prototypes into enterprise-ready, production-grade services 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.