Transform legacy systems without the risk.
From COBOL mainframes to Java microservices, Struts monoliths to Spring Boot APIs—we handle the migrations others avoid.
We modernize what others avoid.
Proven expertise across legacy technologies, with business logic preservation guaranteed.
Mainframe business logic preserved and modernized for cloud deployment. Batch processing, CICS transactions, and DB2 integrations handled.
- Business logic extraction
- Data structure migration
- Transaction mapping
- Performance optimization
Legacy Java applications upgraded with modern language features, frameworks, and runtime optimizations.
- Virtual threads adoption
- Records & pattern matching
- Framework upgrades
- Dependency modernization
Struts applications refactored to modern Spring Boot architecture with proper separation of concerns.
- Controller migration
- Dependency injection
- Security upgrades
- REST API conversion
PHP applications modernized with type safety, performance improvements, and modern framework patterns.
- Type declarations
- Composer dependencies
- Framework upgrades
- Performance tuning
You name it, we can modernize it.
Fortran, Visual Basic, ColdFusion, custom DSLs—if it's code, we've probably seen it. Reach out and we'll assess your specific situation.
Everything you need to plan with confidence.
A comprehensive analysis of your codebase with actionable recommendations—delivered in a single day.
Codebase Analysis Report
Comprehensive static analysis with dependency mapping, complexity metrics, and technical debt assessment.
Risk Assessment
Identified risks, mitigation strategies, and rollback procedures for safe migration.
Migration Roadmap
Phased plan with milestones, resource requirements, and validation checkpoints.
Timeline & Estimates
Realistic effort estimates with dependencies and parallel workstream opportunities.
Technology Recommendations
Target architecture, framework choices, and modernization patterns tailored to your needs.
Executive Summary
Business-focused presentation of findings, recommendations, and ROI projections.
What fits in 1 day—and what doesn't.
Clarity upfront prevents surprises. We'll confirm fit during the scope call.
Fits in 1-Day Assessment
- Single application assessment
- Clear business logic documentation needs
- Standard frameworks and languages
- Team availability for knowledge transfer
- Executive sponsorship confirmed
Needs extended engagement
- Multi-system enterprise migrations (need extended engagement)
- Undocumented mainframe with no SMEs available
- Active regulatory audits requiring immediate compliance
- Systems with no test environments
- Simultaneous migration + new feature development
Phased migration, continuous validation.
We never do big-bang migrations. Every step is validated before moving forward.
01
1-Day Assessment
Deep-dive into your codebase. We map dependencies, identify risks, and deliver a phased roadmap.
02
Phased Migration
Incremental transformation with continuous testing. Rollback capability at every checkpoint.
03
Knowledge Transfer
Documentation, training sessions, and optional ongoing support until your team is self-sufficient.
Migrations we've delivered.
Real modernization projects across industries and technologies.
Insurance Claims Processing
COBOL mainframe to Java microservices, processing 2M+ claims annually with zero data loss.
E-commerce Platform
Struts 1.x monolith to Spring Boot services, reducing deployment time from days to minutes.
SaaS Application
PHP 5.6 + Laravel 4 upgraded to PHP 8.2 + Laravel 10 with full test coverage.
Financial Reporting
Java 6 batch processing modernized to Java 21 with virtual threads, 3x throughput improvement.
Fixed-fee assessment. Flexible migration.
Start with a 1-Day Assessment, then choose the engagement model that fits your timeline.
1-Day Assessment
Comprehensive codebase analysis and roadmap
- Full codebase static analysis
- Risk identification & mitigation plan
- Phased migration roadmap
- Effort & timeline estimates
- Technology recommendations
- Executive summary presentation
Migration Sprint
2-4 weeks of focused modernization
- Dedicated migration team
- Incremental transformation
- Continuous validation testing
- Progress dashboards
- Daily standups
- Rollback procedures
Extended Engagement
6+ weeks for complex transformations
- Multi-system migrations
- Team augmentation
- Knowledge transfer program
- Ongoing support option
- Custom tooling development
- Long-term roadmap execution
Common questions about code modernization.
How do you handle business logic during migration?
We create comprehensive test suites that capture existing behavior before touching any code. This ensures business logic is preserved 1:1 during migration.
Can you modernize systems we don't fully understand?
Yes—we specialize in undocumented legacy systems. We use static analysis, runtime tracing, and domain expert interviews to reconstruct understanding.
What if our technology isn't listed?
If it's code, we can modernize it. We've handled everything from Fortran to Visual Basic to custom DSLs. Reach out and we'll assess your specific situation.
How long does a typical modernization take?
It depends on codebase size and complexity. Our 1-Day Assessment provides a detailed timeline, risk analysis, and phased roadmap tailored to your system.
Do you offer ongoing support after migration?
Absolutely. We offer knowledge transfer sessions, documentation, and optional ongoing maintenance contracts to ensure your team is self-sufficient.
Can you work alongside our existing team?
Yes, we commonly embed with in-house teams. We can lead the migration, support your developers, or provide specialized expertise for specific components.
Our guarantee
If our 1-Day Assessment doesn't deliver a clear, actionable roadmap for your modernization, you don't pay.
We've assessed hundreds of legacy systems. We know what works.
Ready to modernize?
Book a 1-Day Assessment and get a clear roadmap for transforming your legacy systems.
Or reach out at info@buildrlab.com