During March 2026, David van der Stelt enhanced ServiceControl and ServicePulse by delivering two features and a bug fix focused on performance and reliability. He optimized backend user indicator propagation in ServiceControl by batching RavenDB queries, reducing database load and preventing session limit breaches across 30+ endpoints. In ServicePulse, he improved the platform capabilities UI with an accordion-style toggle and added testability hooks to stabilize automated tests. Using C#, JavaScript, and Vue.js, David also addressed a refresh mechanism bug, ensuring UI state resets correctly after fetch errors. His work demonstrated depth in backend optimization and robust front-end testability improvements.