• Optimization MongoDB database by changing relationships from embedded to referenced;• Implementation of RESTful API for communication between client-side and server-side components of the application;• Integration of user authentication and authorization, including the utilization of authentication tokens (e.g., JWT);• Collecting JSON with information about partner vacancies;• Developed a form for the education section in the user's profile page using React.js;• Developed a table to store the form data with the ability to delete and edit.