Worked on enhancing reliability and cross-platform consistency in the SonarSource/sonarlint-eclipse, sonarlint-core, and sonarlint-intellij repositories by addressing time zone and file system issues. Focused on making date and time behavior explicit and deterministic, the developer implemented system default time zone handling and refactored tests to use fixed clocks, reducing flaky outcomes and improving CI stability. In sonarlint-core, they resolved Windows test compatibility for OmniSharp by canonicalizing temporary directory paths, enabling broader test coverage. The work leveraged Java, JUnit, and Eclipse Plugin Development, emphasizing test-driven development and backend improvements to support consistent user experiences across environments.