Legacy code does not automatically need to be rewritten. In many cases, a controlled refactoring strategy can substantially improve maintainability while preserving the existing product and reducing the risk of a complete rewrite.

• Complex functions and components • Duplicated logic • Poor code organization • Tightly coupled components • Difficult-to-maintain modules • Technical debt • Legacy architecture • Error-prone code • Preparing code for new features • Improving separation of responsibilities • Simplifying business logic • Gradual migration to better architecture

My preference is usually incremental and testable improvement instead of unnecessarily replacing functional software.

Understand the existing system.

Identify problematic areas.

Determine what should and should not change.

Define the refactoring scope.

Implement changes incrementally.

Validate that intended behavior remains intact.

Document important architectural or structural changes.

If a rewrite is genuinely more appropriate than refactoring, I can explain why and help define the migration strategy.