Over the past year, contributed to the roc-lang/roc repository by building and refining core compiler infrastructure, focusing on performance, memory management, and reliability. Leveraged languages such as Zig, Rust, and C++ to implement features like atomic refcounting, advanced fuzz testing, and profiling integration with Tracy. Enhanced the build system for cross-platform CI, improved parsing and formatting stability, and optimized memory usage through allocator design and cache invalidation strategies. Addressed bugs in module lifecycle and parsing logic, while introducing robust debugging and error handling. This work enabled safer, faster builds and more predictable performance across large codebases and diverse deployment environments.