Java Developer Migration Persistence Layer (CMP to JPA)

Project overview

For our client, we are currently looking for a software developer in the Java environment to support and implement the migration of a persistence layer from CMP to JPA as part of the "VD-Rechtsschutz" application.

Our client is restructuring its system landscape. Since the future target JBOSS server, unlike the previously used Oracle Weblogic Server (WLS), no longer supports Container Managed Persistence (CMP), the existing "VD-Rechtsschutz" application must be migrated to the Java Persistence API (JPA). The application consists of a Java Swing-based frontend and a Java backend and has various interfaces (e.g., for document generation, archiving, and payment systems). The services are provided independently by the expert using tools such as Eclipse, IntelliJ, Git, and Confluence.

Responsibilities

Our Requirements

• Creation or adaptation of the business component and creation of a new persistence component
• Supplementation and restructuring of existing database tables
• Adjustments of accesses within the application to the new persistence layer
• Conception, creation, and execution of developer tests
• Creation of automated test cases to verify correct migration and general application functionality
• Creation of developer documentation for the programmed components
• Independent development in strict adherence to the programming guidelines and security specifications provided by the client
• Independent and proactive clarification of technical or functional ambiguities
• Several years of in-depth experience in Java development (frontend/backend)
• Strong expertise in database persistence, knowledge of CMP (Container Managed Persistence) and JPA (Java Persistence API) is mandatory
• Experience with JEE application servers (Oracle Weblogic Server and JBOSS)
• Ideally, knowledge in development with Java Swing
• Very good knowledge of common development tools: Eclipse, IntelliJ, and Git (version control)
• Confident handling of Jira and Confluence for project communication and documentation
• Experience with the tools Innovator (modeling) and VP/MS (insurance product modeling) is a big plus
• Very high level of personal responsibility as well as an independent and structured way of working

Project details

01.11.2026

Until 03.31.2027 (Total volume: 100 person-days, split into 40 PD by the end of 2026 and 60 PD in Q1 2027)

Remote / Occasional days on-site in Hanover

• Start: 2026-11
• Duration: 6 Monate
• Remote: remote
• Location: Hannover, Deutschland, DE
• Languages: German