Initial situation
The system was already live in production, but increasing business complexity made it harder to maintain and evolve.
Symptoms included:
- slow development,
- unpredictable failures,
- increasing deployment risk.
Approach
Instead of a full rewrite, an evolutionary refactor was applied.
Key priorities were:
- uninterrupted operation,
- gradual responsibility separation,
- improving observability before major changes.
Execution
The process involved:
- identifying critical domains,
- introducing clear API contracts,
- extracting components step by step,
- validating changes in production.
Outcome
The system became:
- more stable,
- easier to evolve,
- operationally predictable.
The transformation was completed without production downtime.