Monolith to Microservices: Cloud Migration for an EHR Platform at Scale
Client: MedConnect SaaS
Re-architected an 8-year-old monolithic EHR platform into AWS microservices, reducing deployment time from 6 weeks to 4 hours and achieving 99.99% uptime — without a single patient record lost.
6 weeks → 4 hours (96% reduction)
Deployment Cycle Time
99.2% → 99.99% (near-zero scheduled downtime)
Platform Uptime
$1.9M → $890K (53% reduction)
Annual Infrastructure Cost
Feature delivery increased 3.4x post-migration
Engineering Velocity
Le Défi
MedConnect's monolithic Java EHR platform was deployed every 6 weeks, required a 4-hour maintenance window each time, and was costing $1.9M per year to run on aging on-premise hardware. HIPAA compliance audits had flagged gaps in audit logging and data isolation. The platform served 800 clinics and any downtime had direct patient safety implications.
La Solution
We applied the strangler fig pattern to migrate iteratively — no big bang cutover. Over 14 months we decomposed 23 core modules into AWS EKS microservices, built a HIPAA-compliant data layer with field-level encryption, and introduced CI/CD pipelines with automated compliance checks on every commit. We ran chaos engineering exercises to find failure modes before patients did.