Modernize Legacy Systems Without Stopping the Business
We migrate aging monoliths, mainframes, and on-premises systems to modern architectures using proven incremental techniques: no big-bang rewrites, no operational disruption.
Legacy Modernization
- Strangler-Fig Migration
- Microservice Decomposition
- Database Modernization
- Cloud Re-platforming
Incremental Modernization, Not Big-Bang Rewrites
Big-bang rewrites fail. We use the strangler-fig pattern and incremental migration to deliver value continuously while preserving business operations throughout the transition.
Get Started- Strangler-fig pattern for risk-free incremental migration
- Domain-driven decomposition of monolithic systems
- Parallel-running legacy and new systems during transition
- Feature-by-feature cutover with rollback capability
- No business disruption — your operations continue throughout
Legacy Assessment & Roadmap
Before writing a line of new code, we thoroughly understand what you have: its dependencies, data flows, and hidden business logic, to design the safest migration path.
Get Started- Full codebase analysis and technical debt quantification
- Dependency mapping and integration inventory
- Database schema analysis and data quality assessment
- Hidden business logic discovery and documentation
- Prioritized modernization roadmap with risk ratings
Cloud Re-platforming
Move legacy applications to the cloud with targeted re-platforming — changing the underlying platform without a full rewrite, gaining cloud benefits immediately.
Get Started- Lift-and-shift with cloud-native optimization
- Database migration to managed cloud databases
- Containerization of existing applications
- CI/CD pipeline introduction for legacy codebases
- Infrastructure as Code for previously manual environments
Full Refactoring & Rebuilds
When re-platforming isn't enough, we execute targeted refactoring or selective rebuilds, replacing the highest-pain components first.
Get Started- Microservice extraction from monolithic systems
- API layer introduction over legacy backends
- UI modernization of legacy frontend technologies
- Technology stack upgrade (Java 8 → 17, .NET Framework → Core)
- Database schema modernization and normalization
What We Deliver
A comprehensive set of Legacy Modernization capabilities, designed to work together or independently.
Strangler-Fig Migration
Incremental extraction of functionality from monoliths into independent services.
Microservice Decomposition
Domain-driven decomposition of monolithic applications into bounded microservices.
Database Modernization
Migration from legacy RDBMS to modern managed databases, with schema optimization.
Cloud Re-platforming
Move legacy apps to AWS, Azure, or GCP with targeted cloud-native optimization.
Technology Stack Upgrade
Upgrade outdated languages and frameworks to modern, supported versions.
Legacy Documentation
Reverse-engineer and document undocumented legacy systems before and during migration.
Incremental migration approach ensures zero service interruptions during the modernization.
Cloud-native modernized systems typically cost 50–60% less to operate than legacy on-premises counterparts.
Most modernization programs complete initial high-value migrations within 3–12 months.
Why Choose InnovTen
We don't just deliver projects. We build partnerships that drive long-term outcomes.
Zero Big-Bang Risk
Incremental approach means no single moment where everything must work perfectly at once.
Operational Cost Reduction
Eliminate costly mainframe licenses, on-premises hardware, and manual operational processes.
Development Velocity
Modern architectures with CI/CD enable teams to deploy in hours, not weeks.
Talent Retention
Engineers want to work on modern stacks. Modernization helps attract and retain talent.
Eliminate Vendor Lock-In
Replace end-of-life or unsupported platforms with open, portable alternatives.
Hidden Logic Discovery
We document the undocumented business logic buried in legacy code, preserving institutional knowledge.
Our Delivery Process
How we approach every Legacy Modernization engagement, from first call to ongoing operations.
Legacy Assessment
Codebase analysis, dependency mapping, integration inventory, and technical debt quantification.
Domain Decomposition
Identify bounded contexts and decompose the system into migration-ready domains.
Foundation Build
Establish modern infrastructure, CI/CD, and the target architecture before migration begins.
Incremental Migration
Migrate domain by domain using strangler-fig, running legacy and new in parallel with traffic shifting.
Legacy Decommission
Validate full migration, decommission legacy components, and hand over the modernized platform.
Legacy Assessment
Codebase analysis, dependency mapping, integration inventory, and technical debt quantification.
Domain Decomposition
Identify bounded contexts and decompose the system into migration-ready domains.
Foundation Build
Establish modern infrastructure, CI/CD, and the target architecture before migration begins.
Incremental Migration
Migrate domain by domain using strangler-fig, running legacy and new in parallel with traffic shifting.
Legacy Decommission
Validate full migration, decommission legacy components, and hand over the modernized platform.
Legacy Modernization in Action
Real-world applications across industries we've delivered for.
Mainframe to Cloud
Incremental migration of COBOL mainframe to Java microservices on AWS over 18 months, with zero service disruption.
Monolith Decomposition
Strangler-fig extraction of 12 domains from a 10-year-old Rails monolith into independent services.
Legacy ERP Replacement
Phased replacement of 15-year-old on-premises ERP with modern cloud-native system, running in parallel for 6 months.
.NET Framework Upgrade
Migration of .NET Framework 4.5 application to .NET 8, modernizing the stack while preserving all business logic.
Frequently Asked Questions
Common questions about our Legacy Modernization services.
Full rewrites have a very high failure rate. They take longer than estimated, lose institutional knowledge, and you end up with two systems to maintain during the transition. Incremental migration with strangler-fig consistently delivers better outcomes: faster value, lower risk.
We start with a thorough assessment phase where we read, run, and reverse-engineer the legacy system. We document business logic as we discover it, treating this as a critical input to the migration, not an obstacle.
We can build an anti-corruption layer (ACL) that sits in front of the legacy system, translating calls from the new system into legacy formats without touching the legacy code. This is common for COTS systems and mainframes.
The first domain extraction typically takes 2–4 months. Full program timelines depend on system complexity. Most clients complete the highest-value migrations within 6–12 months and continue incrementally from there.
Ready to Get Started with Legacy Modernization?
Tell us about your project. We'll respond within 24 hours with a clear next step.