Senior Java Developer, Mainframe Modernization

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, 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.

We are seeking a Senior Java Developer to join an AWS ProServe mainframe modernization engagement. This initiative transforms legacy COBOL/JCL business logic into cloud-native Java microservices, leveraging agentic AI capabilities to accelerate code generation and ensure functional equivalence with source systems.

Responsibilities

• Transform decomposed mainframe business logic from COBOL and JCL into cloud-native Java microservices using Spring Boot and modern architectural patterns
• Leverage agentic AI tools to generate microservice specifications, modernized application code, and Infrastructure as Code from reverse-engineered mainframe components
• Validate AI-generated output for functional equivalence against original mainframe logic, identify and resolve transformation gaps
• Review and refine mappings between mainframe constructs and target Java microservice implementations to preserve business logic
• Collaborate with architects to refine microservice designs, optimize service boundaries, and implement appropriate API contracts
• Document transformation decisions, architectural patterns, and integration specifications to support knowledge transfer and maintenance

Requirements

• 5+ years of experience in Java development with advanced expertise in Spring Boot
• Advanced skills in microservice architecture style
• Proficiency in AWS Mainframe Modernization services and application modernization
• Reading comprehension of COBOL, JCL, and VSAM file structures
• Familiarity with CICS transaction processing on IBM Mainframe
• Proficiency in English at a B2+ level

Nice to have

• Understanding of cloud-native development patterns
• Knowledge of AWS Transform
• Background in Kiro and AI-assisted development tools

We offer

• 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

EPAM is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity or expression, disability, protected veteran status, or any other characteristic protected by applicable law.