Lead Java Developer, Mainframe Modernization

We are looking for a

Lead Java Developer to drive an AWS ProServe mainframe modernization effort converting COBOL/JCL logic into Java microservices on AWS. You will use agentic AI to speed up spec, code, and IaC generation while validating functional equivalence and refining service designs.

Responsibilities

• Convert decomposed COBOL and JCL business logic into cloud-native Java microservices using Spring Boot and modern architectural patterns
• Use agentic AI tools to produce microservice specifications, modernized application code, and Infrastructure as Code from reverse-engineered mainframe components
• Verify AI-generated outputs for functional equivalence to original mainframe logic, then find and close transformation gaps
• Review and adjust mappings from mainframe constructs to target Java microservice implementations to preserve business logic
• Partner with architects to improve microservice designs, tune service boundaries, and implement appropriate API contracts
• Document transformation choices, architectural patterns, and integration specifications to enable knowledge transfer and ongoing maintenance

Requirements

• Proven record of 5+ years of Java development with advanced Spring Boot expertise
• Strong command of microservice architecture style and related design practices
• Hands-on proficiency with AWS Mainframe Modernization services and application modernization approaches
• Solid reading comprehension of COBOL, JCL, and VSAM file structures
• Working knowledge of CICS transaction processing on IBM Mainframe
• English proficiency at B2+ (Upper-Intermediate) level

Nice to have

• Familiarity with cloud-native development patterns

Knowledge of AWS Transform

• Experience with 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.