Worked on performance monitoring and debugging features in large-scale C++ codebases, focusing on native development for open-source projects. In the facebook/react-native repository, delivered a performance observability feature that reports JavaScript events as instant track markers for sytrace, improving timeline accuracy and aiding debugging. The implementation involved C++ and native integration to enhance event reporting, with groundwork laid for future timestamp decoding. Later, in the google/perfetto repository, implemented source-line aware Breakpad symbolization, extracting source line information from Breakpad files to enable call stack symbolization. This work improved crash diagnosis by linking machine code addresses to source locations, streamlining debugging workflows.