We are seeking an experienced Senior JavaScript Full-Stack Developer to build and evolve production web systems. You will deliver accessible, high-performance UIs and reliable JVM- and TypeScript-based services on cloud infrastructure. Apply to help shape and ship key platform capabilities!

Responsibilities

- Design full-stack solutions that meet product needs with clear trade-offs and scalable patterns
- Build TypeScript and React features with accessible UI patterns and strong client performance
- Develop backend services and shared libraries using Java or Kotlin on the JVM and TypeScript where appropriate
- Implement service-to-service communication using gRPC/protobuf and integrate HTTP/REST APIs
- Model and evolve data in DynamoDB and PostgreSQL to support product features and reliability
- Operate effectively within AWS environments, containers, and CI/CD pipelines to ship safely
- Write and maintain unit, integration, and end-to-end tests to protect quality and delivery speed
- Coordinate cross-team technical decisions and drive design reviews to align implementations
- Improve observability and debuggability through structured logging and tracing practices
- Document architecture, interfaces, and operational guidance to support long-term ownership

Requirements

- 3+ years of full-stack web engineering experience shipping production systems
- Proficiency in TypeScript and React, including state management
- Deep knowledge of UI accessibility patterns and browser performance optimization




- Solid backend skills in Java or Kotlin on the JVM, or TypeScript for shared libraries
- Extensive experience with gRPC + protobuf, HTTP, and REST
- Hands-on data modeling experience with DynamoDB and PostgreSQL
- Practical cloud platform experience using AWS, containers, and CI/CD as a consumer
- Rigorous testing discipline across unit, integration, and end-to-end tests
- Excellent collaboration and communication skills across teams
- Clear technical writing skills for designs and operational runbooks
- Upper-Intermediate English proficiency (B2)

Nice to have

- Cross-platform mobile framework experience such as React Native, Kotlin Multiplatform, Flutter, or Capacitor
- Authentication and identity systems knowledge, including OAuth, OIDC, SSO, and third-party providers
- Experience with OpenTelemetry and structured logging tooling
- Experience building design systems and shared component libraries
- Familiarity with authoring tools, CMSes, or internal back-office applications

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
- Integral career opportunities
- Volunteer and community involvement opportunities
- EPAM Employee Groups
- Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn

📌 Senior JavaScript Full-Stack Developer (Argentina)
🏢 EPAM Systems
📍 Argentina