How to Modernize Legacy Systems Without Breaking Your Business

Upgrading your legacy systems shouldn't mean shutting everything down or putting your business at risk. This slide deck walks you through a smarter, calmer way to modernize — one step at a time.

From understanding your current setup to adopting a hybrid cloud model, using APIs, and automating code refactoring — each slide offers practical tips you can act on. We’ve made it simple and visual, so even complex concepts feel approachable.

You’ll find real-world strategies like starting with non-critical apps, syncing old and new systems in parallel, and protecting what already works while preparing for what’s next.

If you've ever felt stuck between outdated systems and pressure to innovate, this guide is for you. It shows you how to move forward without disruption — and with confidence.

So go ahead — explore, learn, and feel empowered to lead change without chaos.

Read the complete guide at https://kumaran.com/mainframe-modernization-avoiding-downtime-and-disruption/

Transcript

1. Mainframe Modernization Without Disruption Practical strategies to modernize legacy systems while keeping operations running
2. Why Modernize Your Mainframe? of financial systems rely on mainframes. 93% of customer-facing apps rely on mainframes 73% 1 in 3 organizations fear modernization is too disruptive
3. Understand current capabilities, limitations, and risks. Estimate modernization cost. Align with business strategy. Start with a Deep Assessment
4. Use the Strangler Pattern for incremental migration. Start with non-critical apps Ensure sync between old and new systems Break It Down – Phased Modernization
5. Go API-First APIs allow secure communication without replacing core systems. Enables integration with modern tools/cloud. Add API versioning to preserve backward compatibility.
6. Hybrid Cloud is the Future Combine mainframe stability with cloud agility. Move non-critical workloads first Use cloud for analytics, insights, and cost savings. Cloud Mainframe
7. Refactor with Automation Automated tools convert legacy code (e.g., COBOL to Java/.NET) Maintains logic, reduces manual work Boosts scalability and dev productivity Legacy Code Refactored Modern Code REQURES QID: STRUC CUSTE ID: LD INT: STRUC HAME, BALANCE; ENDCUCT: INITIATE POST: DISPLAY “HELLO, WORLD!” class customer { private customerID; private int stgmem; private balance; } public cold getId() { private getstited() gethame() getName(); }
8. Zero disruption = zero revenue loss Lower IT costs and MIPS usage Scalable systems and better developer retention Business Benefits
9. Case Study: Energy Company Migrates Critical Risk Assessment Logistics Application with 0 Downtime Kumaran proposed the cross platform application re-engineering solution using Microsoft .Net technology Kumaran has broken down the application into multiple functional units.​ Why Choose Us 30+ years of experience NxTran automates refactoring Specialized in Linux, Java, Angular migration Visit kumaran.com Visit kumaran.com to read the complete case study. Visit kumaran.com to read the complete case study. Your Trusted Partner – Kumaran Systems Case Study: Monolithic to Microservices Implementation for Leading Retail Bank in Canada​
10. Let’s Modernize Without Risk Ready to modernize your mainframe without disruption? Contact Kumaran Systems today to start your modernization journey. info@kumaran.com | +1-650-394-4649 | kumaran.com