Worked on the airbnb/lottie-ios repository to enhance shape items handling performance within the animation pipeline. Focused on optimizing the processing of complex shapes by refactoring the codebase to use Swift’s Set instead of NSSet, which improved both processing speed and memory efficiency. This change enabled smoother rendering of animations and reduced memory pressure, supporting more complex animation scenarios without altering the existing API surface. The work demonstrated proficiency in Swift, Core Animation, and iOS development, with careful attention to maintaining compatibility and code quality. No major bugs were addressed during this period, with efforts concentrated on targeted performance improvements.