Worked on the facebook/fresco repository, focusing on improving the stability and observability of the image pipeline during January 2026. Addressed a critical thread-safety issue in the Systrace tracing functionality by refactoring the singleton handling in FrescoSystrace.kt, utilizing Kotlin’s @Volatile annotation to ensure safe access across multiple threads. This fix enhanced the reliability of tracing during concurrent image operations, reducing the risk of race conditions and supporting better production debugging. The work demonstrated a strong understanding of Android development and concurrency management in Kotlin, contributing to the maintainability and robustness of the image pipeline without introducing new features.