Hugo Demeyere unified RPC unsubscribe semantics across versions v6, v7, and v8 in the NethermindEth/juno repository, focusing on backend development and refactoring in Go. He centralized the unsubscribe logic by reusing the v6 handler for newer versions, reducing code duplication and streamlining maintenance. This approach improved consistency and reliability of unsubscribe behavior across RPC version updates, making future changes to subscription workflows more manageable. By consolidating logic and enhancing maintainability, Hugo addressed both technical debt and developer onboarding challenges. His work demonstrated depth in RPC protocol understanding and contributed to a more robust and maintainable backend codebase.