Worked on the hyperledger-labs/fabric-token-sdk and fabric-smart-client repositories, delivering features and fixes that improved reliability, configurability, and auditability in blockchain token and network management. Focused on backend development and configuration management using Go, the work included tunable database connection pools, robust identity management with graceful degradation, and enhanced logging for observability. Developed audit metadata capture and flexible token transfer options, ensuring strong test coverage and data persistence. Addressed configuration loading reliability in fabric-smart-client by refining network selection logic and certificate handling, and resolved a key prefix trimming bug, leveraging skills in string manipulation, database management, and unit testing.