Legacy Modernization
From mainframe to cloud, without stopping.
Strangler Fig strategies to migrate critical monoliths to microservices. We modernize your stack without interrupting operations, with guaranteed rollback at each phase.
When this solution is for you
Do you recognize any of these situations in your operation?
Systems without support, few people who know them
Launching new features takes months
Fear of updates because 'it might break everything'
Original vendor disappeared or charges absurd prices
Obsolete technology making it hard to hire talent
What we deliver in practice
Clear service components, without complex technical terms
Risk diagnosis
Complete map of applications and dependencies
- Detailed technical inventory
- Business risk identification
- Technical debt analysis
Modernization roadmap
Phased and predictable plan
- Prioritization by risk/value
- Quick wins identified
- Realistic estimates per phase
Gradual extraction
Migration without big bang
- Features migrated one by one
- Old and new systems coexist
- Documented rollback at each step
Support during transition
Continuous support throughout the journey
- Legacy maintenance while migrating
- Team training
- Monitoring of both environments
How the project works with Codee
Clear and predictable process, with aligned expectations at each stage
Diagnosis
2-3 weeksTechnical and dependency mapping. We identify critical bottlenecks, business risks and quick win opportunities. Code, architecture and integration analysis.
Strategy
1-2 weeksWe define modernization roadmap with clear phases. We prioritize by risk x value. We choose target architecture (cloud, microservices, modular monolith, etc).
First extraction
4-8 weeksWe migrate first module using Strangler Fig pattern. Legacy system continues working. New module gradually takes over. Validation in real production.
Expansion
VariableWe replicate strategy for remaining modules. Pace dictated by complexity and team capacity. Legacy system is gradually shut down.
Examples of scenarios and results
Real cases where we successfully applied this solution
Context
COBOL billing system, critical for operations, without professionals who knew it
What was done
We applied Strangler Fig: new billing microservice coexisting with legacy. Gradual customer migration. Rollback tested at each phase.
Result
Critical module modernized in 6 months, 0 downtime, 100% preserved operations
Context
On-premise routing system didn't scale for Black Friday, complete rewrite would be risky
What was done
We extracted calculation engine to cloud maintaining legacy interface. Immediate performance gain. Then we migrated interface.
Result
-60% processing time, scalability for peaks, migration without impact
Frequently asked questions
Common questions about Legacy
Let's talk about Legacy?
Strangler Fig strategies to migrate critical monoliths to microservices. We modernize your stack without interrupting operations, with guaranteed rollback at each phase.
Talk to an expert in LegacyNo commitment. First conversation is diagnosis.
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