[Epic] COBOL AS400 to Java Microservices Migration

[raykao]

Overview

Migrate existing COBOL AS400 holiday and logging applications to a Java-based, microservices-oriented architecture with containerization and cross-application integration capabilities.

Objectives

• Primary Goal: Convert current COBOL AS400 applications to Java architecture leveraging microservices for improved modularity and scalability
• Containerization: Design as containerized microservices to enable service calls across the broader application portfolio
• Deployment: Simplify deployment and management through container orchestration

Current State

• Existing COBOL AS400 applications for holiday calculations and logging
• Documentation gaps identified in current system

Required Work

Phase 1: Documentation

• Create new system architecture design documentation
• Update existing COBOL documentation to reflect current state of the system

Phase 2: Requirements & Planning

• Define product requirements
• Create technical specifications
• Define epics and user stories for Java microservices conversion

Phase 3: Implementation

• Develop Java microservices architecture
• Containerize services
• Implement cross-application integration
• Testing and validation

Source

Based on meeting transcript from: Cobol AS400 App Migration Meeting (Feb 17, 2026, 3:00 AM)