At AktionSoftware, I split two large .NET services into seven independently deployable microservices, reducing deployment time from around 30 minutes to a few minutes per service. I also resolved a CRM outage by refactoring its highest-load stored procedure, cutting execution time to one-third.
I built an integration-test framework with Testcontainers, in-memory messaging, and WireMock that helped reduce production incidents from around 10 per month to 1–3. I also designed a partner discount workflow that automatically approved around 80% of requests and saved about €7,000 per month in sales review overhead.
At ETNA, I cut p90 latency on join-heavy employee-data APIs from around five seconds to 200–300 milliseconds using layered caching. I also re-architected scheduled jobs from always-on AKS pods to Azure Functions, eliminating idle compute and reducing infrastructure costs.
