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
Bachelor’s degree in Computer Science or re

📌 Senior Java Server-side Engineer (Argentina)
🏢 EPAM Systems
📍 Argentina