Worked on the s-matyukevich/grpc-go repository to streamline the codebase by replacing a custom concurrency utility with Go’s standard library sync.OnceFunc. Focused on refactoring efforts, the developer removed the grpcsync package and its associated tests, reducing unnecessary dependencies and simplifying future maintenance. This change aligned the project more closely with Go idioms, making the codebase easier to understand and safer for future refactors. The work involved careful dependency cleanup and updates to build references, demonstrating proficiency in Go, concurrency patterns, and codebase refactoring. No bugs were reported or fixed during this period, with efforts centered on maintainability improvements.