Rescuing Projects Without Stopping the Business
Legacy modernisation is one of the hardest problems in software engineering. The system has to keep running while you replace it. Business requirements keep changing while you stabilise it. The team that built it may be gone, and the documentation is whatever comments survived. We have done this 20+ times.
The Rescue Process
Every rescue begins with a 1-week paid code audit. We examine architecture quality, security posture, test coverage, database schema design, and external dependency risk. The output is a written assessment with findings prioritised by severity and a realistic effort estimate to complete or stabilise the project. If a clean rebuild is the right answer, we say so — we do not take on expensive remediation work that cannot succeed.
Migration Strategies We Use
- Strangler fig pattern — incrementally replace components while the monolith remains live
- Branch by abstraction — introduce seams to replace dependencies safely
- Database-first migration — stabilise the data model before touching application code
- Shadow deployment — run old and new systems in parallel to validate correctness before cutover
Zero-Downtime Cutover
Every migration we execute targets zero production downtime. Blue-green deployments for application code. Flyway migrations for safe database schema changes with rollback scripts. Feature flags for gradual traffic migration. Automated smoke tests that gate each cutover step. We have maintained 99.9%+ uptime through migrations serving millions of active users.