Code-Safe Modernization Execution
TestingXperts preserves critical business logic while refactoring, using automated code mapping, and validation at each stage of production.
IBM AS/400 (IBM i) Application Modernization Services
Rebuild legacy systems into scalable, cloud-ready platforms without losing core business logic.
Talk to an ExpertLeading With Proven Outcomes
40%
Faster Time-to-Market
60%
Reduction in Legacy Maintenance Cost
95%
Business Logic Preservation
Near-zero
Downtime Migrations
IBM AS400 Consulting Built for Enterprises That Can’t Afford to Break Things
Modernizing IBM i (AS/400) systems isn’t just about code conversion. These platforms often carry decades of critical business logic, wrapped in legacy interfaces, and tightly coupled databases. A single misstep in application modernization can interrupt supply chains, customer billing operations, or compliance workflows. At TestingXperts, our IBM AS400 modernization services help you modernize IBM i applications by restructuring code and decoupling layers. It prepares your systems for integration and scale.
Our iSeries modernization services experts assist you in rebuilding legacy RPG and COBOL systems into modular, API-ready architectures, while maintaining business continuity. Our team executes full-stack modernization across UI, middleware, data access layers, and cloud migration pathways. Every step is backed by controlled rollout strategies, version tracking, automated validation, and rollback safeguards.
Our Key Clients
How Does TestingXperts Solve IBM AS/400 Modernization Challenges?
Transform legacy RPG and COBOL programs into modular services using Java or .NET frameworks.
Decouple green-screen interfaces from back-end logic and build responsive and browser-based front ends.
Expose IBM DB2 data through JDBC connectors, RESTful APIs, and replication pipelines for analytics and integrations.
Replatform AS/400 workloads to containers or VMs, while preserving business rules and core workflows.
Version-control across modernization stages with AI-driven safety checkpoints to prevent unplanned downtime.
Our IBM i (AS/400) Application Modernization Services
Legacy Code Transformation
TestingXperts convert monolithic RPG or COBOL code into maintainable services using Java, .NET, or Node.js frameworks. We preserve business rules while code becomes easier to update and scale.
UI and Front-End Modernization
Our experts can decouple 5250 interfaces and rebuild them using web-native frameworks. The result is a clean, responsive UI that runs in modern browsers without disrupting core logic.
API Enablement and Integration
We expose existing functions and data through RESTful or SOAP APIs using middleware or custom service layers. This allows seamless connections with your ERPs, CRMs, and cloud ecosystems.
DB2 Optimization and Data Access Layering
TestingXperts restructure IBM DB2 schemas for performance and analytics. We surface data using SQL, ODBC/JDBC connectors, or replication tools that stream it to external systems.
Cloud-Ready Application Rehosting
We replatform AS/400 applications to virtual machines or containers on AWS, Azure, or hybrid setups. Your Core business logic remains intact, while infrastructure becomes elastic, scalable and optimized.
CI/CD and Deployment Automation for IBM i
Our experts embed version control, test automation, and rollback paths into your structured deployment pipelines. This reduces operational risk, speeds up releases, and ensures your platform stability.
Why Select TestingXperts for IBM AS/400 Application Modernization?
Modernization Aligned with Cloud Goals
Our engineers architect every step to support IBM AS/400 cloud migration, containerization, and service-orientated architectures.
Engineering-Led, Not Tool-Driven
TestingXperts deliver IBM AS/400 application modernization through experienced engineers, not black-box tools or automated code generators.
Proven Track Record on IBM i
We’ve delivered successful IBM i transformations across regulated industries with complex, high-volume systems.
Ready to modernize your IBM iSeries with AI-driven precision?
Talk to an ExpertInsights
FAQs
What is IBM AS/400/iSeries?
IBM AS/400/iSeries is a platform businesses use to run critical applications. It offers reliable computing, data management, and enterprise-level functions, ensuring stability for critical business operations.
What is AS/400 application modernization?
AS/400 application modernization involves updating legacy IBM AS/400 systems to incorporate modern technologies. This process improves functionality and interfaces and integration of systems with the latest tools and software.
Why should I modernize my AS/400 system if it still works?
Even if your AS/400 system remains operational, modernization enhances security, improves performance, and prepares your business for future technology needs. It prevents AS/400 system from becoming outdated or inefficient. Partnering with leading AS/400 modernization and migration services experts ensure long-term growth and competitiveness.
What are the risks of not modernizing our legacy AS/400 applications?
If you do not modernize legacy AS/400 applications, you may have to face higher maintenance costs and potential security risks. You will face difficulties integrating your old systems with newer systems, hindering business growth and innovation. Although AS/400 is known for its reliability, the aging factor and inherent limitations can create business and technical debt.
What are the primary business benefits of AS/400 modernization?
Partnering with the top AS/400 modernization company would provide several business benefits, such as:
- Increased efficiency
- Lower operating costs
- Improved user experience
- Better scalability
What are the different strategies for modernizing AS/400 applications?
Common IBM iSeries support and services strategies for AS/400 modernization include:
- Updating applications
- Migrating to cloud platforms
- Integrating with modern systems
How do we choose the right modernization approach for our business?
Selecting the right modernization approach requires evaluating your system’s current state, business objectives, and available resources. This helps determine whether you should go for complete overhaul or incremental updates.
Can our AS/400 applications be migrated to the cloud?
Yes, you can migrate your AS/400 applications to the cloud through different methods, such as rehosting or replatforming. This offers flexibility, scalability, and cost savings while preserving core application functionalities.
How do you modernize AS/400 "green screens" to a modern web interface?
Modernizing AS/400 green screens involves creating a user-friendly web interface, typically using modern web technologies like screen scraping, screen re-facing, or API integration. This enhances usability while preserving the functionality of the original AS/400 system.
Can our AS/400 system be integrated with modern applications and web services?
Integration is possible using APIs, middleware, and other tools that connect AS/400 systems to modern applications, improving interoperability, and ensuring seamless communication between legacy and new platforms.
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