I have experience developing comprehensive websites with multiple integrated functionalities, ensuring a robust and seamless user experience. Here’s a brief overview of the key components I’ve implemented:

**1. Login/Signup:** I design and develop secure login and registration systems, allowing users to create accounts and access personalized features. This includes implementing standard authentication methods, password encryption, and user-friendly interfaces for account creation and recovery.

**2. Authorization (SSO or OTP):** To enhance security and user convenience, I integrate Single Sign-On (SSO) solutions and One-Time Password (OTP) systems. SSO enables users to log in with credentials from other platforms (like Google or Facebook), while OTP provides an additional layer of security by sending temporary codes to users' mobile devices or emails.

**3. Admin Dashboard:** I create comprehensive admin dashboards that offer control and oversight over the website’s operations. These dashboards typically include features for user management, content moderation, analytics, and system settings, enabling administrators to efficiently manage and monitor website activities.

**4. Payment Portal:** For e-commerce or subscription-based services, I implement secure payment gateways. This involves integrating with payment processors like Stripe, PayPal, or other financial services to handle transactions, manage billing, and ensure compliance with security standards (e.g., PCI-DSS).

Each functionality is designed with a focus on security, user experience, and scalability. By combining these elements, I ensure that the website not only meets the functional requirements but also provides a reliable, secure, and engaging experience for users and administrators alike.