Replacing a 15-year-old logistics system without disrupting 200+ daily operations

LogiTrack's core logistics platform was built in VB.NET and Windows Forms 15 years ago. It managed 200+ daily shipments but was falling apart: crashes were frequent, the single developer who understood the codebase was retiring, and clients were demanding real-time tracking and mobile access. A full rebuild was necessary, but the business couldn't afford any operational disruption.

We ran both systems in parallel during the migration, building a modern React frontend with a .NET Core API backend. We migrated the SQL Server database schema incrementally, implemented real-time GPS tracking via WebSockets, and built a mobile-responsive progressive web app for drivers and dispatchers. Every feature was validated against the old system before switching over.

The new system launched on time with zero data loss and zero operational disruption. Team productivity doubled as manual data entry was eliminated. Customer satisfaction scores improved by 45% thanks to real-time tracking. The modern tech stack reduced maintenance costs by 60% and enabled the team to ship new features weekly instead of quarterly.