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 legacy integrations

- Clear communication skills and willingness to share ideas and drive alignment

- Bachelor’s degree in Computer Science or related field, or equivalent experience

- English Upper-Intermediate (B2) proficiency

Nice to have

- Docker for local development and service packaging

- Gradle for build configuration and dependency management

- GraphQL for API schema design and query optimization

- Kotlin for JVM-based backend development

- RAML for API modeling and documentation

We offer

- International projects with top brands

- Work with general 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

- Global career opportunities

- Volunteer and community involvement opportunities

- EPAM Employee Groups

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

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