Case study · enterprise-transform
Insurance Monolith Migration
Migrated a 12-year-old monolith with zero business downtime - releases from 6 weeks to 2 days.
Insurance Monolith Migration case studyOverview
The brief.
An insurance carrier's 12-year-old monolith was strangler-migrated to services with zero business downtime, cutting release cycles from 6 weeks to 2 days.
Client
Insurance carrier
Insurance / Enterprise
regulated, multi-state
Gallery
In the wild.
The numbers.
Results
0
business downtime
6wk -> 2d
release cycle
14
domains migrated
0
regression escapes
The challenge
What was in the way.
Big-bang risk
A 12-year-old monolith ran policy, billing and claims. A big-bang rewrite was too risky for a regulated carrier - any failure meant business stoppage.
Regulatory + integration constraints
Dozens of integrations and state regulations meant nothing could simply be swapped. Every change had to be provably safe and auditable.
The solution
How we solved it.
We strangler-migrated domain by domain, dual-running old and new with validation gates, on IaC landing zones with canary deploys and instant rollback - so the business never stopped.
“We moved a 12-year-old monolith and the business never noticed. That's the whole point.”
Outcome
The bottom line.
Migrated a 12-year-old monolith with zero business downtime - releases from 6 weeks to 2 days.
FAQ
About this engagement.
How did you avoid downtime?
Strangler increments with dual-run validation - old and new coexist safely until proven.
What about rollbacks?
Canary deploys with instant rollback rehearsed; every increment reversible.
How long did it take?
Phased over quarters; each domain shipped value before the next started.
Want results like these?
We build to the outcome, then let the numbers speak.