We are seeking a Senior Server-side 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 reliable APIs and high-quality code. Apply to help shape the next generation of mobile platforms.
Responsibilities
- Design and build the Backend-for-Frontend API layer used by mobile applications
- Implement REST endpoints and service contracts that support mobile user flows
- Optimize service performance through profiling, analysis, and targeted improvements
- Refactor legacy code to improve maintainability, readability, and reliability
- Write clean, testable code and maintain strong unit test coverage
- Integrate with existing backend services and handle bespoke and legacy dependencies
- Fix defects by diagnosing root causes and shipping safe, timely patches
- Collaborate with engineers, product partners, designers, and QA to deliver features
- Contribute to CI workflows and build tooling to keep delivery smooth




- Share ideas and advocate for great user experience through API and data design
- Remove unnecessary code and reduce technical debt to keep the codebase healthy

Requirements
- 3+ years of Java experience building server-side applications
- Senior-level collaboration skills working with cross-functional teams
- Strong solution design skills for open-ended problems
- Strong Spring Boot expertise for building and maintaining services
- Strong REST API development skills, including integration with legacy services
- Strong algorithms and data structures knowledge for efficient implementations
- Strong unit testing skills and test-driven mindset
- Build tools knowledge and experience with CI workflows
- Performance analysis and optimization skills for backend services
- Strong troubleshooting skills for debugging and fixing production issues
- Self-starter mindset with ownership and proactive communication
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📌 Senior Java Server-side Engineer (Argentina)
🏢 EPAM Systems
📍 Argentina