Lead Java Server-side Engineer

EPAM Systems, Inc.; United States; Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off and sick leave

Upskilling, reskilling and certificate

LinkedIn Learning library access

Global career opportunities

Job summary

EPAM Systems, Inc. in the United States seeks a Lead Java Server-side Engineer to drive a Backend-for-Frontend service layer powering high-traffic mobile products used by clients worldwide.

You will collaborate with engineers, product partners, designers, and QA to ship reliable APIs and improve legacy integrations. You will architect REST endpoints, optimize performance, modernize legacy code, and ensure clean, testable code with strong unit tests while integrating with existing backend

Qualifications

• 5+ years of Java server-side development.
• Strong collaboration in cross-functional teams.
• Experience designing solutions with unclear constraints.
• Expert-level Spring Boot for building and maintaining services.
• High proficiency with REST API development, including legacy services.

Responsibilities

• Architect and build Backend-for-Frontend API layer for mobile apps.
• Implement REST endpoints and service contracts aligned to mobile user flows.
• Optimize backend performance through profiling and targeted improvements.
• Refactor legacy code to improve reliability and readability.
• Write clean, testable code with strong unit test coverage.
• Collaborate with engineers, product, design, and QA to deliver features end-to-end.
• Contribute to CI workflows and build tooling.

Skills

Java

Spring Boot

REST API design

Performance profiling

Unit testing

CI/CD

Kotlin

GraphQL

RAML

Education

Bachelor's degree in Computer Science or related field

Tools

Gradle

Docker

GraphQL tooling

RAML

Job description

We are looking for a Lead Java Server-side Engineer to drive a Backend-for-Frontend service layer powering high-traffic mobile products used by clients worldwide. You will work closely with engineers, product partners, designers, and QA to ship reliable APIs, improve legacy integrations, and keep performance high. Apply today to help define the next wave of mobile platform capabilities.ResponsibilitiesArchitect and build the Backend-for-Frontend API layer consumed by mobile applicationsImplement REST endpoints and define service contracts aligned to mobile user flowsOptimize backend performance through profiling, analysis, and focused improvementsModernize legacy code through refactoring to improve reliability and readabilityCreate clean, testable code and keep unit test coverage at a strong levelConnect to existing backend services and manage bespoke and legacy dependenciesDiagnose defects, identify root causes, and release safe patches quicklyPartner with engineers, product partners, designers, and QA to deliver features end to endContribute to CI workflows and strengthen build tooling to keep releases smoothPromote great user experience by influencing API and data design decisionsReduce technical debt by removing redundant code and keeping the codebase healthyRequirementsExtensive background in Java building server-side applications (5+ years)Strong collaboration skills in senior-level, cross-functional environmentsProven strength in solution design for problems with unclear constraintsExpert-level Spring Boot experience building and maintaining servicesHigh proficiency in REST API development, including working with legacy servicesDeep understanding of algorithms and data structures for efficient codeConsistent unit testing ability with a test-driven approachWorking knowledge of build tools and practical experience with CI workflowsDemonstrated performance profiling and optimization skills for backend servicesStrong debugging and troubleshooting skills for production incidentsOwnership mindset with proactive communication and follow-throughBachelor’s degree in Computer Science or related discipline, or equivalent experienceUpper-Intermediate English proficiency (B2) for effective communicationNice to haveDocker for local containerized development and CI pipeline executionGradle for build configuration and dependency managementGraphQL and GQL API design/consumption experienceKotlin for JVM-based server-side developmentRAML for API modeling and documentationWe offerInternational projects with top brandsWork with global teams of highly skilled, diverse peersHealthcare benefitsEmployee financial programsPaid time off and sick leaveUpskilling, reskilling and certification coursesUnlimited access to the LinkedIn Learning library and 22,000+ coursesGlobal career opportunitiesVolunteer and community involvement opportunitiesEPAM Employee GroupsAward-winning culture recognized by Glassdoor, Newsweek and LinkedIn