• Developed the backend for a location-based web app using Express (TypeScript) and PostgreSQL with PostGIS.
• Built RESTful APIs with MVC architecture, lowering development bugs.
• Implemented JWT authentication and email services, improving onboarding speed by around 40%.
• Created the admin backend for managing businesses, ads, and admins.
• Advised on hosting and infrastructure; hold 7% equity for technical contributions.
• Simulated a secure TLS-like client-server communication protocol using sockets, RSA, and AES.
• Built a custom handshake protocol to control encrypted session initialization.
• Applied RSA for key exchange and AES for symmetric encryption in real-time communication.