Senior Backend Engineer - Scalable Mobile APIs

EPAM Systems; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Healthcare benefits

Paid time off

Upskilling and certification

LinkedIn Learning access

Global career opportunities

Job summary

EPAM Systems, Inc. is seeking a Senior Server-side Engineer to design and evolve a backend-for-frontend layer powering mobile client experiences. You will build Spring Boot services in Java, implement REST endpoints with clear contracts, and optimize performance while maintaining code quality.

You will collaborate with product, design, and QA to deliver end-to-end features. The role emphasizes leadership, mentoring peers, and contributing to large, cross-functional projects in an agile

Qualifications

• 3+ years of Java experience building server-side applications.
• Strong leadership skills to influence technical decisions and mentor peers.
• Proven project delivery experience in large cross-functional teams.
• Spring Boot knowledge for building scalable services.
• Strong REST API design skills for contract-first, maintainable endpoints.
• Strong algorithms and data structures skills for solving complex problems.
• Strong unit testing skills to ensure correctness.
• CI experience with build and test automation.
• Experience with asynchronous programming and concurrency concepts.
• Performance profiling and tuning skills.
• Refactoring skills and safe handling of legacy code.
• Excellent communication and proactive mindset.
• Upper-Intermediate English proficiency (B2).
• Docker/Gradle/Kotlin and GraphQL experience are a plus.

Responsibilities

• Design backend-for-frontend APIs that support mobile client use cases.
• Build Spring Boot services in Java with clean, maintainable architecture.
• Implement REST endpoints with clear contracts and predictable behavior.
• Optimize performance through profiling, tuning, and efficient data access.
• Write unit tests to protect critical logic and enable safe changes.
• Refactor legacy code to improve readability, safety, and extensibility.
• Integrate with existing backend services and adapt to evolving interfaces.
• Implement asynchronous flows where needed to improve responsiveness.
• Automate builds and checks within CI pipelines.
• Review code to uphold standards and share best practices.
• Collaborate with product, design, and QA to deliver end-to-end features.

Skills

Java

Spring Boot

REST API design

Algorithms & Data Structures

Unit testing

CI/CD

Asynchronous programming

Performance tuning

Refactoring

Communication

English proficiency

Leadership

Education

Bachelor's degree in Computer Science or related field

Tools

Docker

Gradle

GraphQL

Kotlin

RAML

Job description

EPAM Systems, Inc. is seeking a Senior Server-side Engineer to design and evolve a backend-for-frontend layer powering mobile client experiences. You will build Spring Boot services in Java, implement REST endpoints with clear contracts, and optimize performance while maintaining code quality.

You will collaborate with product, design, and QA to deliver end-to-end features. The role emphasizes leadership, mentoring peers, and contributing to large, cross-functional projects in an agile