Lead Java Server-side Engineer

EPAM Systems; Argentina; On-site; ARS 1,200,000 - 1,800,000; Full time

Job summary

EPAM Systems is seeking a Lead Java Server-side Engineer to drive a Backend-for-Frontend service layer powering high-traffic mobile products worldwide. You will collaborate with engineers, product partners, designers, and QA to deliver reliable APIs and sustain top performance.

You will design REST endpoints, optimize backend performance, refactor legacy code, and mentor teammates to ensure robust test coverage and clean, scalable code.

Qualifications

• Bachelor's degree in Computer Science or related field.
• 5+ years building server-side Java applications.
• 1+ year of leadership experience.

Responsibilities

• Design and build Backend-for-Frontend API layer for mobile apps.
• Develop REST endpoints aligned to mobile user flows.
• Improve backend performance through profiling and targeted optimizations.
• Refactor legacy code for reliability.
• Ensure unit test coverage and collaboration across teams.

Skills

Java

REST APIs

Leadership

Backend Performance

Education

Bachelor's degree in Computer Science

Job description

We are seeking a Lead Java Server-side Engineer to drive a Backend-for-Frontend service layer powering high-traffic mobile products serving clients worldwide. Collaborate closely with engineers, product partners, designers, and QA to deliver reliable APIs, enhance legacy integrations, and sustain top performance.

Responsibilities

• Design and build the Backend-for-Frontend API layer consumed by mobile applications
• Develop REST endpoints and define service contracts aligned to mobile user flows
• Enhance backend performance through profiling, analysis, and targeted improvements
• Refactor legacy code to boost reliability and readability
• Write clean, testable code and sustain unit test coverage at a strong level
• Integrate with existing backend services and manage bespoke and legacy dependencies
• Investigate defects, pinpoint root causes, and ship safe patches quickly
• Collaborate with engineers, product partners, designers, and QA to deliver features end to end
• Support CI workflows and strengthen build tooling to keep releases smooth
• Advocate for great user experience by influencing API and data design decisions
• Cut technical debt by eliminating redundant code and keeping the codebase healthy

Requirements

• Bachelor's degree in Computer Science or related discipline, or equivalent experience
• 5+ years of experience building server-side applications in Java
• At least 1 year of relevant leadership experience