Over a three-month period, contributed to performance and documentation improvements across multiple Go-based repositories. In golang/go, developed a contention-reducing backoff strategy for the garbage collector on arm64, leveraging concurrent programming and system-level optimizations in Go to improve throughput and latency. For itchyny/go, implemented Neoverse core detection to optimize memmove operations, applying CPU architecture knowledge to enhance memory copy performance on targeted hardware. In madeline-underwood/arm-learning-paths, updated documentation and cross-platform setup guides using Markdown and technical writing, clarifying CLI arguments and streamlining onboarding. The work demonstrated depth in system programming, performance tuning, and clear, maintainable documentation practices.