Worked on enhancing the croc repository by expanding its file transfer scalability and configurability using Go. Focused on command line interface development and file transfer protocols, the work introduced concurrency improvements that enabled support for more than 16 simultaneous file transfers. Added new CLI options allowing users to specify the number of ports used during transfers, with updates to the interface to reflect these configuration choices. These changes improved throughput and flexibility for cross-device file sharing, reducing transfer times and broadening potential use cases. The engineering effort centered on efficient concurrency management and user-driven configurability within the Go-based CLI environment.