Developed a Mock API module for the anzalean/water-tracker-frontend repository, enabling frontend testing independent of backend services. The work centered on JavaScript-based API mocking, with utilities that simulate realistic API responses for user and water data. By designing mock data structures and integrating delay mechanisms, the developer ensured that UI components could be tested with consistent, deterministic data. This approach improved test coverage and reduced flaky tests by addressing bad data handling within the mock layer. The solution accelerated local development and made continuous integration testing more reliable, leveraging skills in frontend development and API mocking to streamline the workflow.