Senior Java Developer (with Kotlin)

EPAM Systems; Phoenix (AZ); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, Dental and Vision Insurance (

Health Savings Account

Flexible Spending Accounts (Healthcare

Short-Term and Long-Term Disability

Life and AD&D Insurance

Employee Assistance Program

LinkedIn Learning access

Matched 401(k) Retirement Savings Plan

Paid Time Off

Identity Theft Protection

Employee Discounts

Employee Stock Purchase Program

Job summary

EPAM Systems is seeking a Senior Java Developer with strong Kotlin expertise to build and scale the Backend for Frontend service layer powering mobile applications used by millions of users worldwide. This hybrid role requires 3 days onsite in Atlanta, GA or Phoenix, AZ.

You will design, develop, and maintain high-performance APIs, collaborate across cross-functional teams, and drive best practices in testing and continuous integration.

Qualifications

• 5+ years of professional backend experience in Java/Kotlin
• Strong hands-on proficiency in Kotlin for backend development is required
• Experience building and maintaining RESTful APIs with performance considerations

Responsibilities

• Build, scale, and maintain the server-side API layer powering mobile apps
• Write clean, well-tested Kotlin/Java code with focus on performance
• Optimize and refactor existing systems and drive performance improvements
• Integrate with internal services, third-party APIs, and data sources in a distributed architecture
• Collaborate with mobile engineers, product managers, designers, and QA to deliver end-to-end experiences

Skills

Java

Kotlin

REST APIs

CI/CD

Gradle

Unit Testing

API Design

Problem Solving

Cross-functional Collaboration

Education

Bachelor's degree in Computer Science or equivalent

Tools

Gradle

CI/CD tooling

REST tooling

Job description

We're seeking a Senior Java Developer with strong Kotlin expertise to build and scale the Backend for Frontend (BFF) service layer powering mobile applications used by tens of millions of users worldwide. This is a hybrid role requiring 3 days onsite in Atlanta, GA or Phoenix, AZ. If you thrive on solving complex problems, writing clean code, and building high-performance APIs — we'd love to connect.

Req# 1033156951

Responsibilities

• Build & Scale Backend Services: Design, develop, and maintain the server-side API layer consumed by award-winning mobile applications
• Write High-Quality Code: Deliver clean, well-tested, production-ready Kotlin/Java code with a focus on performance and maintainability
• Optimize & Refactor: Improve existing systems, modernize legacy code, and drive performance analysis and optimization efforts
• Integrate Complex Systems: Connect with internal backend services, third‑party APIs, and data sources across a distributed architecture
• Collaborate Cross‑Functionally: Work closely with mobile engineers, product managers, designers, and QA to deliver seamless end‑to‑end experiences

Requirements

• Experience: 5+ years of professional experience in server-side software development with Java; Bachelor's degree in Computer Science or equivalent experience
• Kotlin: Strong hands‑on proficiency in Kotlin for backend development is required
• API Development: Solid experience building and maintaining RESTful APIs, with familiarity in asynchronous programming and performance optimization
• Engineering Practices: Strong foundation in unit testing, CI/CD, build tools (Gradle), code reviews, and software development lifecycle best practices
• Problem Solving: Proven ability to design solutions for open‑ended problems, debug complex issues, and work effectively with legacy systems
• Collaboration & Ownership: Self‑starting mindset with excellent communication skills and the ability to thrive in a large, cross‑functional team environment

Nice to have

• Experience with GraphQL (GQL) or RAML for API design and documentation
• Contributions to or experience working with open-source projects
• Background in building Backend for Frontend (BFF) layers or mobile‑facing service architectures

We offer

• Medical, Dental and Vision Insurance (Subsidized)
• Health Savings Account
• Flexible Spending Accounts (Healthcare, Dependent Care, Commuter)
• Short‑Term and Long‑Term Disability (Company Provided)
• Life and AD&D Insurance (Company Provided)
• Employee Assistance Program
• Unlimited access to LinkedIn learning solutions
• Matched 401(k) Retirement Savings Plan
• Paid Time Off
• Legal Plan and Identity Theft Protection
• Accident Insurance
• Employee Discounts
• Pet Insurance
• Employee Stock Purchase Program

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our clients, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting‑edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

Engineer the Future with a Career at EPAM

Applications will be accepted on a rolling basis.

EPAM will not provide new H-1B visa sponsorship for this position. Candidates with existing transferable H-1B status may be considered.