Over a two-month period, contributed to alibaba/zvec, vortex-data/vortex, and facebookincubator/nimble by delivering targeted improvements in code quality, performance, and documentation. Enhanced the HNSW index implementation in C++ by correcting terminology and updating CMake requirements, streamlining onboarding and future builds. In vortex-data/vortex, used Rust to optimize buffer copying for primitive arrays and introduced comprehensive tests to ensure data casting reliability, addressing potential silent data corruption. Additionally, improved documentation consistency in Nimble by refining grammar in project materials. The work demonstrated a focus on maintainability, data integrity, and performance optimization across C++, Rust, and technical writing.