Worked on the Effect-TS/effect repository to enhance reliability and cross-database compatibility in backend systems. Focused on improving database client initialization by addressing connection test procedures, the developer replaced a prepared statement with an unprepared SELECT 1 query for connection testing. This adjustment streamlined startup processes and reduced friction when connecting to both MSSQL and MySQL databases. The work leveraged TypeScript for backend development and involved careful database management and SQL expertise. By refining the connection test mechanism, the developer contributed to more robust and portable database integrations, ensuring smoother deployments and improved compatibility across widely used relational database systems.