Solution
Legacy App Modernization
Modernise an ageing application step by step, with tests that protect what already works.
The problem
- 01
Old code is slow and risky to change
- 02
No tests exist to catch breakages
- 03
A full rewrite feels too risky
How QALabs solves it
- Step 1
Capture current behaviour
QA documents and tests how the existing app works today.
- Step 2
Plan the migration
A phased plan replaces parts of the system one at a time.
- Step 3
Rebuild in stages
Each stage ships behind regression tests that confirm nothing broke.
- Step 4
Retire the old system
Final cutover after side-by-side checks pass.
Tools we use
- React
- Node.js
- Docker
- PostgreSQL
- Playwright
Proof
Case study coming soon