Worked on the bugsnag/bugsnag-cocoa-performance and bugsnag/bugsnag-cocoa repositories, delivering feature upgrades and release engineering over three months. Developed the Bugsnag Cocoa Performance SDK v1.14.0 and v1.15.0, introducing onStart span callbacks, a plugin interface, and the BugsnagPerformanceNamedSpans module to enhance observability and extensibility. Refactored concurrency logic using C++ and Objective-C, improving memory management and thread safety with std::shared_ptr. Released Bugsnag Cocoa SDK v6.33.1, adding enhanced observer events for grouping discriminator updates and updating code ownership governance. Maintained thorough documentation and changelogs, supporting reliable onboarding, auditability, and ongoing maintenance through disciplined version control and release management.