Legacy System Modernization
AI-AssistedFrom monolith to microservices — without losing data or business logic
Legacy systems are a paradox: they are critical to business, but increasingly difficult to maintain and develop. Lack of documentation, outdated technologies, vendor lock-in — these are problems most enterprises face. At ESKOM.AI, we specialize in safe modernization — rewriting systems to modern architecture while preserving business logic developed over years, and migrating data without risk of loss.
Legacy System Analysis and Modernization Plan
We start with reverse engineering of the existing system — analyzing source code, database, business processes, and integrations. AI helps extract business rules from undocumented code. We create a detailed modernization plan with stages, risks, and cost estimates.
Gradual Migration — Strangler Fig Pattern
Instead of a risky Big Bang, we apply gradual migration — new features are built in modern architecture, while old ones are replaced module by module. Legacy and new systems run in parallel, minimizing risk. Each stage is verified with automated comparative tests.
Data Migration and Integrity Validation
Data migration is the most critical stage of modernization. We design ETL processes, transform data schemas, and validate integrity at every step. Automated comparative tests verify that the new system produces identical results to the old one — for every business scenario.
Documentation and Team Training
Modernization is not just rewriting code — it's an opportunity to create documentation the legacy system never had. We deliver technical, architectural, and user documentation. We train the client's team on the new system and transfer full knowledge.
Key Highlights
- Safe migration preserving business logic
- Gradual modernization — no risky Big Bang
- AI for reverse engineering undocumented code
- Automated comparative tests: old vs new system
- Complete documentation the legacy never had
- Team training and vendor independence
Why ESKOM.AI?
From monolith to microservices — without losing data or business logic
Experience with legacy systems
We have modernized systems over a decade old. We know how to extract business logic from undocumented code and safely transfer it.
AI accelerates reverse engineering
AI agents analyze source code, databases, and logs — extracting business rules much faster than traditional manual audit.
Zero data loss
Multi-stage data integrity validation, comparative tests, automatic rollbacks — guaranteed safe migration.
Modern target architecture
Microservices, containerization, CI/CD, monitoring — the modernized system is ready for the next decade of development.