Proceedings of the International scientific and practical conference ―Science in the Modern World‖ (May 4-6, 2026) / Publisher website: www.naukainfo.com. – Barcelona, Spain, 2026. - 260 p.

70 or the appearance of a generic confirmation window as a success. However, the hybrid approach allows the framework to parse the internal JSON response [4], identifying these hidden failures and providing precise diagnostics regarding the root cause of the error. Ultimately, combining the visual validation of desktop clients with the deterministic verification of the REST API layer creates a robust safety net for complex E2E scenarios. This synchronization not only accelerates the release cycle by reducing "hard waits" but also ensures that the software meets both user-facing and backend data integrity standards. The integration of hybrid data validation into the automation lifecycle marks a significant advancement in achieving high-fidelity testing for enterprise desktop solutions. By synchronizing the UI layer with deterministic backend verifications via RestSharp or HttpClient, the methodology effectively mitigates the risks associated with visual-only automation, such as "flaky" results and hidden logical failures. Furthermore, this approach optimizes the resource utilization within CI/CD pipelines by replacing redundant wait times with intelligent, non-intrusive polling. Ultimately, the synergy between desktop interaction and API-layer synchronization ensures a more resilient testing architecture, allowing for faster release cycles and higher confidence in the overall data integrity of the software product. REFERENCES: 1. RestSharp. Official website. URL: https://github.com/restsharp/restsharp 2. HttpClient. Official website. URL: https://learn.microsoft.com/en- us/dotnet/api/system.net.http.httpclient?view=net-10.0 3. Appium. Official website. URL: https://appium.io/docs/en/2.0/ 4. JSON. Official website. URL: https://en.wikipedia.org/wiki/JSON