Legacy Migration

Zero-Downtime Legacy Migration

Migrate from outdated technology to a modern stack without disrupting your business. We preserve your data, your logic, and your uptime.

Plan Your Migration Enterprise Modernization

Common Migration Paths

We have experience migrating from virtually any legacy stack to modern technologies

COBOL / Mainframe
Java / Cloud Native

Modernize mainframe workloads to scalable Java microservices on the cloud.

Legacy .NET / VB
.NET 8 / React

Upgrade classic ASP.NET and VB.NET to modern .NET 8 with React frontends.

PHP / WordPress
Next.js / Node.js

Migrate monolithic PHP applications to modern JavaScript/TypeScript stacks.

On-Premise SQL
Cloud Database

Migrate on-premise databases to managed cloud services with zero data loss.

Phased Migration Approach

A risk-managed, phased approach that ensures zero downtime throughout

01

Discovery & Assessment

Weeks 1-2

Deep dive into your legacy system to understand dependencies, data structures, and business logic that must be preserved.

  • Codebase & architecture audit
  • Data dependency mapping
  • Business logic documentation
  • Risk & complexity scoring
02

Migration Strategy

Weeks 3-4

Design a phased migration plan using the strangler fig pattern to minimize risk and maintain business continuity.

  • Phased migration roadmap
  • Target architecture design
  • Data migration strategy
  • Rollback & contingency plans
03

Phased Migration

Weeks 5-14

Execute migration module by module, with parallel running and thorough validation at each phase.

  • Module-by-module migration
  • Data migration & validation
  • Parallel system running
  • Continuous regression testing
04

Cutover & Stabilization

Weeks 15-16

Final cutover with zero downtime, performance validation, and stabilization support.

  • Zero-downtime cutover
  • Performance benchmarking
  • Data integrity verification
  • Post-migration support

What's Included

Full-service migration from assessment through post-migration support.

Complete legacy system assessment
Target architecture design
Phased migration execution
Data migration & validation
Zero-downtime cutover strategy
Automated regression testing
Performance benchmarking
Business logic preservation
API backward compatibility
Team training on new stack
Rollback procedures
90-day post-migration support

Case Study

Insurance / Enterprise14 weeks

Insurance Platform Migration

A national insurance provider needed to migrate a 20-year-old COBOL-based claims processing system to a modern cloud-native platform. The system processed 50,000+ claims daily and could not afford any downtime during the transition.

0
Minutes Downtime
100%
Data Integrity
5x
Processing Speed
60%
Infrastructure Cost Savings
“Migrating a 20-year-old system with zero downtime seemed impossible. Sensussoft made it look easy. Our claims processing is now 5x faster.”
David Kim, VP Engineering - NationalShield Insurance

Ready to Leave Legacy Behind?

Get a free migration assessment and discover how we can move your systems to a modern stack with zero downtime.

Get Free Assessment Enterprise Modernization