AWS-to-Azure Migration Without Downtime
Migration and optimization of cloud infrastructure for enterprise systems
Client: A large EU-based utilities enterprise, Germany
Zero
downtime for dependent services
AWS → Azure
microservices, storage and database migrated
IaC
staging environment built and tested before cutover
Challenge
Microservices, storage and database had to move from AWS to Azure without downtime — and the database itself had to change engine on the way, from Aurora MySQL to SQL Server.
Solution
A staged migration: infrastructure as code to build and test the new Azure environment, workloads moved in stages, dependencies switched only after full testing, and a final synchronization to capture everything written during the switchover. The cutover was seamless for dependent services.
Implementation
- 01Migration divided into stages to keep risk small
- 02Services adjusted to match the Azure architecture
- 03Staging environment built and tested through infrastructure as code
- 04Final cutover synchronized modified data and validated every service in production
Business impact
A fully modernized, high-performance platform on Azure
Zero downtime for dependent services during the migration
Improved system stability and cloud resource alignment
Technology stack
Have a complex system to build or modernize?
Tell us what must change. We will bring the relevant domain and engineering leads into the conversation.