During March 2026, Erik Birn focused on backend stability for the crowdsecurity/crowdsec repository by addressing a critical bug in the Notification Sentinel component. He resolved an issue with Azure notification integration by ensuring the x-ms-date header was consistently lower-cased, which preserved correct HMAC authentication and prevented authorization failures caused by header canonicalization. Working in Go, Erik applied targeted changes to the API integration layer, verifying that the fix maintained security and reliability for Azure service authorization. His work demonstrated depth in backend development and HMAC authentication, directly reducing the risk of notification delivery outages and improving the robustness of cloud integrations.