Services

Application Modernization

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Application Modernization Services for Enterprise Systems​​

Modernize legacy IBM Z, COBOL, PL/I, and enterprise applications with AI-powered modernization, DevOps, and cloud integration – without disrupting business operations.

MAINFRAME MODERNIZATION • PILLAR 01
APPLICATION MODERNIZATION

Modernize how
mainframe
applications are built and evolved.

Move developers into modern IDEs and Git pipelines, expose your COBOL and CICS assets as APIs, refactor with confidence, and accelerate every step with AI and GitHub Copilot — all without losing the reliability of z/OS.

Explore capabilities → See AI & Copilot ↗
VS Code — Z Open Editor · main.cbl
*--- PAYMENT-POST : COBOL on z/OS ---
PERFORM VALIDATE-ACCOUNT
git commit -m 'refactor: modularize'
zowe zos-jobs submit BUILD.JCL
✧ Copilot: generate unit test?
✧ Copilot: explain this paragraph
PIPELINE → GitHub Actions → RC=00

IDE

Modern developer experience on z/OS

Git

Open SCM, build & deploy

API

CICS/IMS/COBOL as REST

AI

VRX Analyzer Agent
Copilot-Assisted Development

What We Deliver

Application modernization capabilities

We modernize the way mainframe software is written, built, and connected – bringing z/OS development in line with the rest of your engineering organization.

APP · IDE

Integrate with a modern IDE

Move developers off green-screen ISPF into a modern, productive editing experience.

  • VS Code with Zowe & Z Open Editor
  • IBM Developer for z/OS (IDz)
  • Syntax highlighting, debug & navigation
  • Faster onboarding for new developers
APP · SCM/CI

Modern SCM, build & deploy

Replace legacy library managers with Git and automated, repeatable builds.

  • Git-based source control for z/OS code
  • IBM Dependency Based Build (DBB)
  • Automated, versioned deployments
  • Migration from Endevor / Changeman / ISPF
APP · API

API integration

Turn core mainframe assets into secure, reusable services for digital channels.

  • Expose CICS, IMS & COBOL as REST APIs
  • z/OS Connect enablement
  • Secure, governed API access
  • Mainframe in modern app & web flows
APP · REFACTOR

Refactoring

Simplify and modularize aging programs without changing business behavior.

  • Break monoliths into components
  • Improve readability & maintainability
  • Reduce technical debt incrementally
  • Behavior locked in by automated tests
APP · AI

AI Enablement

Introduce AI, GitHub Copilot, and the VRX Analyzer Agent to understand, document, test, and accelerate application modernization.

  • GitHub Copilot in the developer’s IDE
  • VRX Analyzer Agent for AI-led legacy code analysis & understanding
  • AI-generated code explanation, documentation & business rules
  • AI-assisted test case & test data generation
  • Faster analysis, smarter decisions, and lower-risk delivery
MAINFRAME + AI

Bring GitHub Copilot and AI to your COBOL codebase

AI is where application modernization accelerates fastest. With Copilot in the IDE and AI assistants built for z, teams understand legacy code faster, write and test it quicker, and de-risk every change.

Copilot in the IDE

Context-aware completion, boilerplate, and inline suggestions for COBOL, PL/I, and JCL inside VS Code and IDz.

Explain & document legacy code

AI summarizes decades-old programs in plain language and drafts documentation — cutting onboarding time and key-person risk.

AI-assisted refactoring & translation

Selectively refactor or translate COBOL toward Java with assistants like IBM watsonx Code Assistant for z.

Automated test generation

Generate unit and regression tests to capture current behavior before refactoring — so modernization never breaks the business.

Impact & dependency analysis

AI-assisted mapping of call chains and data flows across programs, copybooks, and jobs — so change is planned with confidence.

Developer productivity

Faster reviews, quicker fixes, and less routine boilerplate — freeing scarce mainframe talent for higher-value work.

GitHub Copilot watsonx Code Assistant for Z VS Code Z Open Editor IBM Developer for z/OS
How We Work

A pragmatic, low-risk path

We modernize applications incrementally – proving value early and protecting the systems your business depends on.

Step 01

Assess

Inventory applications, dependencies, and pain points to shape a clear roadmap.

Step 02

Enable

Set up modern IDEs, Git, pipelines, and AI/Copilot tooling for your teams.

Step 03

Modernize

Refactor, expose APIs, and translate selectively — guided by AI, locked in with tests.

Step 04

Sustain

Embed the new tools and practices so they become business as usual.

Get Started

Modernize your mainframe applications — with AI and Copilot on your side.

Tell us about your languages, tooling, and delivery process, and we'll map a practical application modernization path.

Talk to our team
Pillar 02
Infrastructure Modernization →
Pillar 03
Process Modernization · zDevOps →

Unlocking the Future: Mainframe Application Modernization

At VRNexGen, we specialize in modernizing your mainframe applications, ensuring a seamless transition to a modern, efficient, and scalable environment. Our end-to-end Mainframe Modernization services help you integrate advanced tools and methodologies, bridging the gap between legacy systems and today’s cutting-edge technologies.

Here’s how we do it:

Why Application Modernization Matters

Legacy applications often become barriers to innovation, increasing maintenance costs, limiting scalability, and slowing business agility. Application modernization helps organizations transform COBOL, PL/I, Java, and legacy workloads into secure, cloud-ready, and API-enabled environments while preserving critical business logic.

Benefits:

  • Faster delivery cycles
  • Reduced technical debt
  • Improved developer productivity
  • Enhanced security
  • Better cloud integration
  • Lower operational costs

Our Mainframe Application Modernization Solutions Include:

Modernization Tools

Leverage state-of-the-art tools like IBM Developer for z Systems (IDz), ADDI to enhance your development environment and streamline workflows.

Enterprise zDevOps Integration

We offer full-scale DevOps solutions with Jenkins, GitHub, IBM DBB, and UrbanCode Deploy to ensure continuous integration and deployment across your entire enterprise, reducing bottlenecks and accelerating time-to-market. Harness the power of DevOps automation with Jenkins, Git, IBM Dependency- Based Build (DBB), UrbanCode Deploy (UCD) and DevOps Deploy for z/OS. Achieve continuous integration and delivery across both mainframe and distributed environments.

Mainframe Integration Solutions

Seamlessly integrate your mainframe with modern platforms and technologies, creating a hybrid environment that boosts operational efficiency and agility.

IBM zCloud Offering

Move to the cloud with confidence using IBM zCloud. We help you migrate and manage your mainframe workloads in the cloud, unlocking new levels of flexibility and cost efficiency.

Why Choose VRNeXGen for Application Modernization?

VRNeXGen combines deep expertise in IBM Z, COBOL, PL/I, CICS, DB2, DevOps, Cloud, and AI-powered modernization technologies. Our team helps organizations modernize mission-critical applications while minimizing risk, reducing costs, and accelerating digital transformation initiatives. With proven frameworks, modern tooling, and industry-leading expertise, we enable enterprises to modernize with confidence and innovate faster.

What clients say about our Modernization Services

VRNexGen’s expertise in IBM modernization tools completely transformed how we manage our legacy COBOL and PL/I applications. Their implementation of IDz, ADDI, and DBB not only reduced our deployment time but significantly improved the overall development experience. We now operate with better visibility, automation, and efficiency. It’s been a game-changer for our IT strategy.
Director of IT Operations,xGlobal Services Company
From the first engagement to the final delivery across all four phases, VRNexGen demonstrated deep mainframe expertise, professionalism, and a commitment to excellence. Their ability to handle complex IMS/DB and CICS development while upskilling our team in REXX and automation was exceptional. We now have a stable, maintainable system backed by empowered internal teams.
Program ManagerAcademic Division, Fortune 10 Company
We were looking for a partner who could guide us through our IDz implementation and modernization goals—VRNexGen exceeded our expectations. From tool configuration to developer training, they ensured a smooth rollout and 100% adoption of the new environment. Their knowledge and delivery model made a complex transition look effortless.
Modernization LeadEnterprise Infrastructure Group, Fortune 10 Client
Contact us

Schedule a Free Mainframe Modernization Consultation

Whether you’re evaluating modernization options, planning a legacy transformation initiative, or seeking IBM Z expertise, our specialists are ready to help.

Call us at: +91 90438 44640
Your benefits:
  • Client-oriented
  • Independent
  • Competent
  • Results-driven
  • Problem-solving
  • Transparent
What happens next?
1

We Schedule a call at your convenience 

2

We do a discovery and consulting meting 

3

We prepare a proposal 

Schedule a Free Consultation