Astadia's COBOL transformation solutions provide the opportunity to liberate COBOL-based legacy systems from their dependency on compiler technology and convert them to Object-Oriented languages such as C# or Java, or to another COBOL compiler technology.

Astadia supported the modernization of a major European Bank’s COBOL-based host application by replatforming it on to a modern, cloud-enabled infrastructure and enabling the benefits of modern technologies, environments and architectures.

The Project

The project was led by GFT and consisted in the modernization of the COBOL-based host application by building a modern target environment, migrating, and commissioning relevant software. Astadia and GFT managed the end-to-end migration, including:

  • Definition of a modern, container-based target architecture and support client during deployment.
  • Migration of the selected application modules and transfer of host-specific elements, such as sequential files, into platform-compatible solutions. Part of the migration were the job nets of the migrated application itself, as well as their embedding into the existing job net for all further host applications.
  • Documentation at all levels - from conception to operating manual - and coaching of employees.

Main Challenges

Transformation of the host-based application landscape while reducing operating costs

  • Modernize a key part of the existing core banking application by connecting the sales partners to the depot system with only minimal code changes
  • Replatform as an initial step in the transformation of business-critical applications with continuous cooperation with all existing peripheral systems and databases
  • Reduction of running costs for infrastructure and software by reducing MIPS, especially at reporting date processing (month-end/year-end)

Additional requirements for the migrated application

  • Operability without emulation in the target environment
  • Ongoing maintenance by existing developers


The project benefited from Astadia's FastTrack platform, a collection of tools, processes and technologies that accelerate and standardize a successful mainframe migration project. FastTrack allows applications to undergo complex cross-platform migrations at the same time as normal perfective and adaptive maintenance progresses without business interruption.

Migratonomy process. Source: GFT

Main Benefits

Increased performance, boosted efficiency and reduced costs

  • Despite the necessary additional data exchange between host and Unix system up to 90 minutes faster processing of the processes
  • Reduction of previously occurring additional MIPS costs for key date processing at the end of the month and year


> Visit the GFT website for a detailed description of the project.

> Learn more about Astadia's COBOL modernization solutions.

About the client


Financial institution registered in the European Union, providing services in areas of asset management, real estate, services, capital markets and financing.


Financial Services


Mainframe Modernization, Replatforming, COBOL refactoring, Modern rehosting, Cloud migration


Reduced annual operating costs, increased processing speed, access to cloud services

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