Lead Server-side Engineer (Java) at EPAM Systems – Argentina | Jobyssey

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

Benefits

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
Global career opportunities
Volunteer and community involvement opportunities
EPAM Employee Groups
Award-winning culture recognized by Glassdoor, Newsweek and LinkedIn

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Responsibilities

Requirements

Nice to have

Benefits