امین طهماسبی

I developed a VPN based on SSH, where the user end is built with Flutter, Dart, Kotlin, and the backend is built using Python and Fast API. User Authentication: Implemented user permissions and authentication features to ensure only authorized users can establish a VPN connection. This was done by integrating the system with an existing user management database, which includes strong password policies and two-factor authentication. Performance: The VPN was designed to be fast and reliable. By using SSH, a protocol known for its efficiency and stability, you ensured the VPN can handle high levels of traffic without sacrificing speed. Unfilterability: Thanks to the implementation of SSH, the VPN has a high degree of resistance against censorship and blocking attempts. SSH is commonly allowed through firewalls due to its ubiquity in secure remote administration, which makes SSH-based VPNs hard to filter out without disrupting other services. Scalability: The use of Python and Fast API in the backend provides high scalability. This means the VPN can support an increasing number of users without requiring significant modifications. Cross-Platform: The user end of the VPN is built with Flutter and Dart, which means it can run on multiple platforms (iOS, Android, Windows, etc.), thereby providing a seamless user experience regardless of the operating system. Security: SSH provides strong security out of the box, protecting data in transit with robust encryption. This makes the VPN suitable for transmitting sensitive data.

Development of a virtual smart card reader based on the kernel and user on an Android banking device for communication with the Civil Registration system: I have developed a virtual smart card reader, working at both the kernel and user level of an Android banking device, to establish communication with the Civil Registration system.

Real-time Monitoring: The system was designed to provide real-time status updates for cashless and SSL devices. This allows for immediate troubleshooting and resolution of issues, reducing downtime and improving the overall efficiency of your services. Database Management: Postgres was utilized as the database system, providing a robust and scalable platform for handling and storing the large amounts of data generated by the monitored devices. User Interface: The UI, developed using JS, HTML, and CSS, was designed to be user-friendly and intuitive, making it easy for operators to view the status of devices and perform necessary actions. Scalability: The use of Python and Flask in the backend supports scalability. As such, the system can efficiently handle an increasing number of devices without requiring significant changes to the system's architecture. Alert System: The monitoring system could include a feature that sends alerts (via email or SMS) to designated personnel when a device reports an error or unusual behavior. This allows for quick intervention and troubleshooting, thereby reducing downtime and potential losses. Reporting and Analytics: The system includes features for generating detailed reports on the operational status and performance of the devices. This data can be used for further analysis, such as identifying patterns in device malfunctions, peak usage times, and other relevant metrics. Secure Communication: The system ensures secure communication with devices, leveraging SSL protocols to encrypt the transmitted data, thus ensuring protection against potential cyber threats.

High-performance Transaction Processing: Go, with its concurrency features and powerful standard library, offers high-performance processing capabilities. This makes it an ideal choice for the development of a transaction switch that needs to handle high-volume, real-time transactions. ISO8583 Protocol Expertise: The ISO8583 protocol is a standard for systems that exchange electronic transactions made by cardholders and originated from point-of-sale (POS) terminals, ATMs, and other similar devices. Your knowledge and application of this protocol demonstrates your deep understanding of financial transaction processing systems. Efficient Message Parsing: The ISO8583 transaction switch you developed is capable of efficiently parsing incoming transaction messages according to the ISO8583 standard. This ensures that each transaction is correctly interpreted and processed. Secure Transaction Processing: Your system ensures secure transaction processing by adhering to industry standards for data security and encryption, reducing the risk of data breaches or fraudulent transactions. Scalability and Performance: Built with Go, your transaction switch is designed to scale and maintain performance under high transaction loads. This means that as transaction volumes increase, your switch is capable of maintaining a high level of performance and efficiency. Error Handling: The system has robust error handling capabilities, providing clear error messages for failed transactions and offering mechanisms for retrying or reversing transactions when necessary. Interoperability: The ISO8583 standard ensures that your transaction switch is interoperable with various financial systems and devices, increasing its usefulness and applicability.