Optimize SourceFS performance across Rust systems code, Linux kernel interactions, filesystems, memory, CPU, and disk I/O. Profile and eliminate bottlenecks using perf, eBPF, Valgrind, and custom benchmarks; improve cache efficiency, asynchronous I/O, scheduling, and concurrency. Build reproducible benchmarking infrastructure and optimize large build graphs for Android, Yocto, and high-core hardware. Collaborate closely with customers and teammates while owning solutions end to end.