Development and Debugging: - I wrote clean and efficient code in Node.js, contributing to back-end applications. - I utilized the Express.js framework to enhance the performance and functionality of the applications.- I was actively involved in debugging and resolving issues within our services, including identifying and fixing bugs and errors.- Optimizing code for better performance, and ensuring the smooth operation of the services.Writing Integration Tests: - I developed and implemented robust integration tests to ensure the reliability and stability of the applications.- I worked with technologies like Chai and Mocha to simulate realistic usage scenarios and validate the functionalities of the applications.