Complete my Job portal Angular 16 with node+express Project / Frontend already done

Project Title: Full Stack Web Application Development with Node.js, Express, Angular 16, Payment Gateway Integration, and Single Login Page with Role-Based Access Project Description: I am looking for an experienced freelancer to help complete my web application project. The frontend of the project has already been developed using Angular 16, and I need a skilled developer to integrate the backend using Node.js and Express, along with integrating a payment gateway for processing transactions. Additionally, I need a single login page that assigns different roles (Super Admin, Manager, Employee, Student) after authentication, and redirects users to the appropriate dashboard based on their role. The key aspects of the project include: Frontend Details: The frontend is built with Angular 16, which includes responsive pages, UI components, and necessary routes. All frontend logic and components are set up, but the application currently lacks backend functionality. Backend Requirements: The backend needs to be built using Node.js and Express. The main tasks for the backend are: RESTful API development to handle data interactions between the frontend and database. Database integration: Set up a MongoDB or MySQL database for storing data, depending on your expertise. Authentication and Authorization: Implement a single login page where users can authenticate and be assigned a role (Super Admin, Manager, Employee, or Student). After successful login, the system will check the role and redirect users to their respective dashboards or sections. Roles will have specific access permissions: Super Admin: Full control over all features. Manager: Limited control over certain management features. Employee: Limited access to certain tasks or personal data. Student: Access to student-specific data or resources. CRUD operations: Implement Create, Read, Update, and Delete operations for various resources as needed by the frontend. Middleware setup: Set up middlewares for error handling, validation, logging, etc. API integration with frontend: Ensure that the API routes communicate seamlessly with the Angular frontend. Payment Gateway Integration: Implement a secure payment gateway (such as Stripe, Razorpay, or PayPal) to handle user payments. Handle payment processing securely. Implement success/failure response management. Store transaction data in the database. Admin Panel Development: Build an Admin Panel with role-based access to allow admins to manage users, view transactions, and handle system-related tasks. Based on the user's role, they will have access to different parts of the admin panel. Deployment setup: Provide deployment instructions for both backend and frontend (using services like Heroku, AWS, or DigitalOcean). Key Features to Implement: Single Login Page: Users will log in via a single page, and the backend will check their role after authentication. Based on their role, they will be redirected to the appropriate page. Super Admin: Redirected to full access dashboard with user and system management. Manager: Redirected to a dashboard with limited management access. Employee: Redirected to a personal dashboard or task-specific area. Student: Redirected to their respective student-related dashboard. User registration and login system with JWT authentication. Secure API endpoints for various data operations. Data validation and error handling. Payment processing functionality integrated with the chosen payment gateway. Admin Panel with role-based management features. Ability to integrate third-party APIs (if required). Unit and integration tests for the backend API (optional but recommended). Technical Stack: Frontend: Angular 16 Backend: Node.js + [login to view URL] Database: MongoDB / MySQL (depending on the developer’s expertise) Authentication: JWT or Sessions with role-based access control. Payment Gateway: Stripe / Razorpay / PayPal (or another suitable gateway) Admin Panel: Custom-built, with features for user management, transaction history, and content management, based on user roles. Version Control: Git Project Timeline: Estimated Timeline: 3-4 weeks (depending on the scope and developer availability) I am expecting clear communication and regular updates throughout the project. Skills Required: Proven experience with Node.js and Express.js. Experience with MongoDB or MySQL and database design. Proficiency in JWT or session-based authentication systems with role-based access control. Strong knowledge of RESTful API development. Experience in payment gateway integration (Stripe, Razorpay, PayPal, etc.). Experience with developing admin panels with role-based permissions. Ability to work with an Angular frontend and integrate APIs. Understanding of version control using Git. Familiarity with deployment services like Heroku, AWS, or DigitalOcean. Additional Notes: You should be able to work independently and handle both frontend and backend integration. The Single Login Page must authenticate the user, check their role, and redirect them to the appropriate dashboard. The Admin Panel must be secure, user-friendly, and allow full management of users and transactions based on roles. The payment gateway integration must be secure, and you should ensure proper handling of transactions, refunds, and successful/failed payments. Please provide examples of previous full-stack projects you’ve worked on, especially if you have experience with role-based authentication and payment gateway integration.