Worked on the hiero-ledger/hiero-json-rpc-relay repository to deliver a targeted optimization for Mirror Node API data fetching. Focused on reducing unnecessary data transfer, the developer modified the API to omit transaction data parameters when they were not required, directly addressing performance and scalability objectives. This approach reduced payload sizes and network load, resulting in improved response times for mirror node data retrieval. The implementation was completed in TypeScript and Node.js, with careful attention to code quality and documentation. The work was tracked to a specific issue, ensuring traceability and alignment with project goals, and demonstrated effective API development practices.