We are seeking a Senior Java Engineer to build and evolve a Backend for Frontend service layer that powers high-traffic mobile experiences for clients worldwide. You will collaborate with engineers, product partners, designers, and QA to deliver fast, reliable APIs and maintain beautiful code.

Responsibilities

- Design and deliver the Backend for Frontend API layer for mobile clients

- Build server-side services in Java using Spring Boot and modern patterns

- Implement and maintain REST APIs with attention to usability and consistency

- Optimize performance through profiling, analysis, and targeted improvements

- Write unit tests and enforce quality gates through continuous integration

- Refactor and simplify codebases by improving or removing legacy code safely

- Fix defects quickly and prevent regressions through root-cause analysis

- Collaborate with engineers, product partners, designers, and QA to ship features

- Integrate with existing backend services and handle compatibility constraints

- Propose solutions for ambiguous problems and communicate technical tradeoffs

Requirements

- 3+ years of Java backend development experience

- Strong Spring Boot experience building server-side applications

- Strong REST API design and integration experience

- Strong algorithms and data structures knowledge

- Strong unit testing skills and experience with test automation





- Build tool experience with CI pipelines and automated quality checks

- Performance optimization skills for asynchronous and high-throughput services

- Problem-solving skills for open-ended technical challenges

- Team collaboration skills in cross-functional environments

- Self-starter mindset with ownership and initiative

- Bachelor’s degree in Computer Science or equivalent practical experience

- Upper-Intermediate English skills (B2) for clear written and spoken communication

Nice to have

- Docker experience for local development and deployments

- Gradle experience for builds and dependency management

- GraphQL experience for API schema design and query optimization

- Kotlin experience in server-side development

- RAML experience for API modeling and documentation

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

- General career opportunities

- Volunteer and community involvement opportunities

- EPAM Employee Groups

- Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn

📌 Senior Java Engineer (Argentina)
🏢 EPAM Systems
📍 Argentina