Worked on the cosmos/cosmos-sdk repository, delivering five features and resolving five bugs to enhance stability, configurability, and consensus alignment in blockchain infrastructure. Focused on backend and CLI development using Go, the work included introducing a CLI flag for consensus key algorithm selection at genesis, aligning transaction sizing with the CometBFT consensus engine, and improving BaseApp stability through concurrency and initialization fixes. Enhanced error handling was implemented for gRPC queries, and deterministic transaction checking was added via a new handler. Additional contributions included documentation updates and code cleanup, demonstrating depth in configuration management, concurrency, and consensus layer integration within the Cosmos SDK.