We started with testing phase of the software development.
Started with the Unit Testing. I started with the testing of Employer Module. In the Employer Module, it was found that the profile picture of the user was not being displayed. So the module was modified to display the profile picture as well.
When the modules were integrated, it was found that format of certificate was not according to the requirements. The problem was detected and it was solved by using the correct condition. The application now works correctly.