Legacy Modernization Services, powered by Agentic AI Framework
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Book a Legacy Estate Assessment
Legacy Can Still Run the Business. It Can't Run What's Next.
Legacy estates, mainframe and non-mainframe, still run the business. What they lack is ability to innovate and have a risk due to the scale of change, both these aspects can be solved using HTC accelerator for AI driven Legacy Modernization framework called HTC MAIGE Janushift. The modern foundations legacy was never built to provide. And the pressure only builds: run costs keep climbing as more of the budget goes to keeping systems alive instead of building, the skills grow scarce as fewer people know the code and the documentation was never written, and the deadlines are external as platforms, runtimes, frameworks and databases go out of support. High costs, scarce talent, and years of undocumented change stand between you and real agility.
HTC closes that gap with an AI-driven legacy modernization services, at the pace your business needs. Whatever the stack, mainframe or midrange, old .NET or old Java, Windows, Struts, 4GL, or client-server, if it still runs the business but no longer moves with it, we modernize it. Where the platform still fits, we modernize in place. Where it doesn’t, we rehost to the cloud fast with minimal code change, replatform onto modern environments with targeted rework, or rearchitect completely, where most of our client work happens today, turning undocumented legacy logic into modern, cloud-native, AI-ready applications with human-validated accuracy at every step. Every path, one partner. And with Janushift, our Generative AI and agentic AI -led platform for reverse and forward engineering, we get you there in months, not years.
Your legacy modernization paths accelerated with HTC as the Modernization Partner bringing an AI-first approach to your journey.
Modernize in Place
Keep the platform, remove the constraint. When the system works but cannot connect or change fast enough, we open it up without moving it.
- REST and event APIs over CICS, IMS, DB2 and MQ
- Business rules extracted and documented
- Monolithic programs refactored into modular services
- Modern CI/CD, automated testing and observability on the platform
- Right fit when the workload is stable and the problem is integration or change velocity
Modernize in Place
Rearchitecting (Most Common)
Where most of our client engagements live today, because it’s where real transformation happens. Janushift’s Generative AI and agentic engine runs in full here, reverse engineering then forward engineering, with a human in the loop and real speed behind it.
- Reverse Engineering: Generative AI agents scan the codebase, map dependencies and reconstruct business rules legacy systems never documented.
- Forward Engineering: Generative AI rebuilds in modern languages, cloud-native, automated testing built in.
- Human-validated at every step, so nothing ships on guesswork.
- The difference: years of transformation, compressed into months.
Rearchitecting (Most Common)
Rehosting (Lift & Shift)
Move to the cloud fast, with minimal code change and minimal risk. Janushift’s AI agents map your dependencies upfront, so the lift is planned, not guesswork, and nothing breaks on the way over.
- Lift-and-shift to AWS, Azure, or GCP, as-is
- Bare-minimum code changes, no re-architecture
- Dependency mapping before you move, not after
- Fastest exit from costly legacy infrastructure and end-of-support platforms
Rehosting (Lift & Shift)
Replatforming
Move to a newer, more capable OS, without the time or risk of a full rewrite. Janushift’s AI agents flag compatibility gaps and dependencies before migration begins, so functionality carries over clean.
- From z/OS, Unisys, Bull, Fujitsu, HP, Windows Server, and SQL Server to modern runtime environments
- Also the path for end-of-support Windows Server, SQL Server, and middleware
- Compatibility checked before the move, not discovered after
- No disruption to how the application already behaves
- Right fit for exiting unsupported platforms fast, on a fixed deadline
Replatforming
Every Legacy Stack, Not Just The Mainframe
Capabilities - From Assessment to Acceleration
Legacy Intelligence & Assessment
Legacy Intelligence & Assessment
Agentic AI-driven inventory, dependency mapping, and readiness scoring.
Code & Architecture Transformation
Code & Architecture Transformation
Generative AI-powered code conversion into modular, web-based architectures.
Validation, Testing & Cutover
Validation, Testing & Cutover
AI-driven automated testing and parallel-run output comparison.
Post-Modernization Acceleration
Post-Modernization Acceleration
Cloud deployment, DevOps, and observability enablement.
Data and Integration Migration
Data and Integration Migration
Data and interface migration with row-level reconciliation.
Proven Before It Goes Live
Modernized code is only finished when you can see it behaves the same. Six checks, every wave.
Janushift's Generative AI extracts the business rules; your experts sign them off before rebuild starts.
Regression suites derived from real legacy behavior, not from the new design.
Same inputs, side by side, compared field by field. Every difference explained before cutover.
Batch windows, throughput and response times measured against the legacy baseline.
You see what each gate caught, and what it missed.
Every wave can be reversed on its own, with legacy and modern running side by side.
Start With 4 Weeks, Not 4 Years
The Legacy Estate Assessment. Fixed scope, fixed fee, four weeks. A decision-ready, AI-driven picture of your estate, whether or not you go further with us. You get an application inventory with dependency maps, a complexity and readiness score per application, a recommended path for each (modernize in place, rehost, replatform, rearchitect or retire), a data and integration migration assessment, a wave-based roadmap with sequencing and dependencies, indicative cost, duration and risk per wave, and a target-state architecture with a wave-one test plan. No obligation to proceed. The assessment is yours either way.
Why Janushift? Your Trusted Partner in Modernization
Legacy Modernization That Moves Your Business Forward
Generative AI, Agentic AI and Cloud Innovations
Modernized applications run natively on Generative AI, agentic AI and cloud, the things legacy systems were never built for, turning years of technical debt into a platform ready for what’s next.
Lower Total Cost of Ownership
Modernization shifts spend from keeping the lights on to building what’s next, cutting the cost of keeping legacy alive and freeing budget currently locked into legacy upkeep.
Faster Time-to-Market
Modern, cloud-native architectures let you ship features and respond to market change in weeks, not the 2–4 year cycles legacy systems typically demand.
Reduced Risk, Preserved Knowledge
Modernization done right doesn’t just rewrite code, it reconstructs the business rules and logic buried in undocumented legacy systems, so decades of institutional knowledge survives the transition instead of walking out the door.
Speed and Accuracy, at Scale
HTC’s Janushift, powered by Generative AI and agentic capabilities, accelerates the heaviest lifting, reverse and forward engineering, with up to 90% automation, under 1% code loss and full traceable lineage, and human validation at every step, turning what typically takes years into months.
Faster, More Predictable ROI
With HTC’s phased, AI-accelerated approach, every wave delivers value on its own, with the first capability live in two quarters, not the open-ended multi-year payback legacy transformation programs are known for.
Our Insights
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