Raphael contributed to ProvableHQ/snarkVM by optimizing the development build process, disabling link-time optimization in dev and test Cargo profiles to accelerate local cargo run and test cycles. This adjustment, implemented through Rust and Cargo.toml configuration, improved developer productivity by shortening feedback loops and streamlining the workflow. In Syndica/sig, Raphael expanded test coverage for core I/O utilities, focusing on PeekableReader and Lazy, and addressed a minor bug in Lazy’s return-value handling. Using Zig and unit testing, Raphael’s work enhanced reliability and maintainability, demonstrating depth in build system configuration, performance optimization, and software testing across both repositories within a short timeframe.