Logistics · 2025
Rebuilt a 12-year-old logistics platform without losing a single shipment
The client's legacy logistics platform processed billions in freight per year — and was taking the engineering team down with it. We migrated it incrementally to a modern stack while production traffic kept flowing.
0
Customer-facing incidents during migration
4.2x
Faster page loads
63%
Reduction in p95 latency
11 mo
Total migration timeline
Problem
What we walked into
A monolithic ASP.NET app with a 200-table database, untested business logic, and a release cycle measured in weeks. Every change was a coin flip.
Solution
What we shipped
An incremental migration to Next.js + Postgres + a typed service layer. We extracted bounded contexts one at a time, ran them in shadow mode, and cut traffic over only when parity was proved.
Approach
How we did it
- 01
Mapped the monolith into 9 bounded contexts using event storming with the team
- 02
Stood up a typed API gateway and Postgres replica with logical replication
- 03
Migrated one context at a time, each running in shadow mode for 2 sprints before cutover
- 04
Built a regression harness from production traffic to catch parity bugs before customers did
- 05
Hardened observability — SLOs, alerting, runbooks — so the team owned operations from week one
"Primeline did the impossible. They rebuilt our most critical system without us losing a single shipment, and our team is faster than they've been in a decade."
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Ready to ship?
Tell us what you're building. We'll write back within one business day with a clear path forward — scope, timeline, and price.