Cloud Infrastructure
Legacy System Cloud Migration
15 years of tech debt retired in 9 months. Zero downtime.
ClientB2B SaaS Provider
Duration9 months
Year2023
Stack
DockerKubernetesAWSCI/CDMicroservices
Overview
Successfully migrated a 15-year-old monolithic architecture to a modern, scalable microservices environment with zero downtime.
The Challenge
A critical SaaS platform had outgrown its monolithic roots. Deployments took days, scaling required costly manual intervention, and the development team spent 60% of sprint time on maintenance rather than features.
Our Solution
Using the strangler-fig pattern, we progressively extracted services from the monolith into containerised microservices orchestrated by Kubernetes. A robust CI/CD pipeline and blue-green deployment strategy ensured continuous availability throughout the 9-month migration with no service interruption.
Key Results
- 1Zero downtime throughout the entire 9-month migration
- 2Deployment frequency increased from bi-weekly to multiple times daily
- 3Infrastructure cost reduced by 38% through right-sizing and auto-scaling
- 4Developer productivity up 55% with faster build and test cycles