When this route is useful.
- A system is old, but the business still depends on it every day.
- A rewrite is being discussed before the team understands hidden rules.
- Maintenance depends on one person, old notes or informal knowledge.
Legacy systems
Legacy systems: understand risk before rewriting, replacing or ignoring them.
An English entry page for companies dealing with old systems, undocumented rules, risky changes and modernization decisions.
Scope
What RM Porto Tech usually reviews in this context.
Understand what must keep working
Critical flows, integrations, data, jobs, reports and exceptions come before technology preference.
Make risk visible
Map dependencies, deployment, data ownership, support pain and knowledge gaps.
Choose a modernization path
Compare stabilize, document, refactor, replace, integrate or rewrite.
Related content
Read these before or after requesting a review.
Legacy systems hub
Technical hub with concepts and routes.
Open routeTechnical decisions
Compare modernization options.
Open routeLegacy Java modernization service
Service route for deeper analysis.
Open routeFAQ
Before requesting support.
Is an old system always bad?
No. The risk is not age alone; it is lack of knowledge, evidence, ownership and safe change paths.
Where should modernization begin?
Begin by mapping critical business flows and technical dependencies before choosing a replacement strategy.