COBOL & Mainframe Modernization
Preserve the existing.Enable the future.
Many business-critical applications have been running reliably on COBOL and mainframe systems for decades. The challenge often lies not in the existing system itself, but in its integration into modern IT, data, and cloud architectures.
RetroCode helps companies to specifically modernize their established COBOL and legacy systems – from refactoring individual applications to modern interfaces and data integration to gradual migration.
For us, this applies:
Not every COBOL system needs to be replaced. But every business-critical system needs a future strategy.
The right modernization path for your systems:
Modernization is not a standard project. Depending on the system, business requirements, technology, and risk profile, different paths may be sensible.
Stabilize
Existing COBOL applications are analyzed, technically optimized, and prepared for long-term operation.
This includes, among other things, code analysis, refactoring, documentation, and reducing technical risks.
Integrate
Existing mainframe and COBOL systems are connected to new applications and platforms via modern interfaces.
APIs and modern integration architectures enable the continued use of existing business logic without having to replace entire systems.
Make data available
Business-critical data often still resides on mainframe or IBM i systems.
We enable the integration of this data into modern data platforms, analytics, cloud, and AI applications – without unnecessarily altering the existing core systems.
Modernize
Existing applications and architectures are gradually modernized. Individual components can be extracted, redeveloped, or integrated into modern architectures.
This allows for the controlled evolution of established system landscapes.
Migrate
When a replacement is economically and technologically sensible, we support the gradual transformation of COBOL applications into modern technologies and architectures – for example, as part of a COBOL-to-Java migration.
In this process, traceability, functional safety, and a controlled transition are central.
Our services
- Analysis of existing COBOL and mainframe systems
- Legacy system analysis and modernization strategy
- Code analysis and refactoring
- Modernization of existing COBOL applications
- API enablement
- Mainframe integration
- Integration of COBOL systems with modern applications
- Provision of mainframe data for modern platforms
- Integration into cloud, data, and AI architectures
- Gradual replacement of individual components
- COBOL-to-Java Transformation
- Legacy Migration
- Support for parallel operation and transformation
No Big Bang – but controlled modernization
A complete replacement of mission-critical systems is often expensive, complex, and associated with significant risks.
Therefore, we first look at the existing system landscape and together with you answer four key questions:
What should remain?
What should be modernized?
What should be integrated?
What should be replaced in the long term?
From this, we develop an individual modernization path that protects investments while enabling technological advancement.
Mainframe meets modern data world
Modern applications, analytics, AI, and regulatory requirements increasingly need direct access to data from existing core systems.
RetroCode combines deep COBOL and mainframe expertise with modern integration and data architectures.
This makes existing systems part of a modern IT landscape – without necessarily having to replace their proven business logic.