We are looking for a Lead Server-side Engineer to build and evolve a high-scale Backend for Frontend service layer for mobile experiences used by tens of millions of cardholders worldwide. You will lead design and delivery with a cross-functional team, prioritize performance and code quality, and help shape technical direction. Apply to join us.
Responsibilities
- Design the Backend for Frontend architecture for mobile-facing APIs
- Lead technical decisions and mentor engineers on best practices and code quality
- Build server-side services in Java using Spring Boot
- Define and implement REST API contracts that support excellent client experiences
- Write unit tests and enforce reliable automated test coverage
- Optimize latency, throughput, and resource usage through performance analysis
- Coordinate delivery with product, design, and QA to meet quality and timeline goals
- Refactor legacy code to improve maintainability, readability, and safety
- Fix production issues by debugging, triaging, and implementing robust solutions
- Integrate with existing backend services,



including bespoke legacy systems
- Improve CI and build pipelines to increase delivery speed and confidence
- Review code and promote clean, elegant, and secure implementations

Requirements
- 5+ years of Java backend development experience
- Strong leadership skills in guiding engineers and technical decision-making
- Proven project delivery experience in cross-functional teams with product, design, and QA
- Advanced Spring Boot knowledge for building server-side applications
- Strong REST API design skills for mobile-facing service layers
- Solid algorithms and data structures knowledge for solving complex problems
- Strong unit testing skills and test-driven development mindset
- Hands-on performance analysis and optimization skills for high-traffic services
- Experience with CI and build tools in modern engineering workflows
- Strong problem-solving skills for open-ended solution design and lega

📌 Lead Server-side Engineer (Buenos Aires)
🏢 EPAM Systems
📍 Buenos Aires