My Projects

Saeed AliShahbazi profile

Selected projects mostly focused on backend engineering, APIs, and freelance-ready solutions.

Dr. Rezvani Veterinary Clinic

Client project · Live site

Screenshot of Dr. Rezvani Veterinary Clinic website

Implemented full website and appointment/contact backend for a veterinary clinic. Deployed to cPanel (shared hosting). Lightweight, SEO-friendly static pages plus dynamic forms.

  • HTML
  • CSS
  • JavaScript (f18i.js + i18n JSON)
  • PHP (contact & appointment form handling)
  • cPanel / shared hosting
Live Demo GitHub
Implementation notes
  • Frontend built with semantic HTML and responsive CSS, prioritizing accessibility and speed.
  • Localization via locales/*.json and js/f18i.js for runtime text swapping.
  • Forms post to PHP endpoint that validates input and sends emails (hosted on cPanel).
  • Deployed via cPanel file manager / FTP; runs on shared hosting with caching headers.

Secure User Management & Authentication API (JWT + OAuth2)

User Management API icon

Built a RESTful API with signup, login, password recovery, roles, and permissions.

  • Node.js
  • Express
  • MongoDB
  • JWT
  • OAuth2
Docs GitHub
Implementation notes
  • Secure JWT authentication with role-based access control.
  • OAuth2 integration for third-party login support.
  • Input validation and password hashing for security.
  • Comprehensive API documentation for clients.

Cryptocurrency Payment and Transaction Management System (USDT, Bitcoin, Ethereum)

Cryptocurrency Payment System icon

API to accept, verify, and record payments with webhook and strong security.

  • Node.js
  • Express
  • MongoDB
  • Webhook Security
Docs GitHub
Implementation notes
  • Webhook verification for secure payment processing.
  • Support for multiple cryptocurrencies including USDT, Bitcoin, and Ethereum.
  • Database transaction logging and error handling.
  • API designed for integration with various frontend clients.

Online Appointment Booking System

Appointment Booking System icon

Suitable for clinics, beauty salons, educational centers, and more.

  • PHP
  • MySQL
  • REST API
  • Responsive UI
Docs GitHub
Implementation notes
  • Responsive frontend UI compatible with various devices.
  • Robust PHP backend with secure MySQL database integration.
  • REST API endpoints for appointment management.
  • Input validation and notification email integration.

Inventory and Orders Management Panel

Inventory & Orders Panel icon

Multi-user support, reporting, and REST API for frontend integration.

  • Node.js
  • Express
  • PostgreSQL
  • JWT
  • Role-based Access
Docs GitHub
Implementation notes
  • Role-based access control for different user types.
  • Real-time inventory tracking and order management.
  • Comprehensive reporting features.
  • Secure REST API for frontend applications.

Real-time Chat Backend Service

Real-time Chat Backend icon

Built with WebSocket, Redis Pub/Sub, or Socket.io technologies.

  • Node.js
  • Socket.io
  • Redis
  • WebSocket
Docs GitHub
Implementation notes
  • Low-latency messaging with WebSocket protocol.
  • Scalable pub/sub architecture using Redis.
  • Socket.io for fallback and browser compatibility.
  • Session management and authentication integration.

Background Task Scheduler and Retry System

Task Scheduler Microservice icon

Built microservice for asynchronous processing with Redis Queue or Celery.

  • Python
  • FastAPI
  • Redis (RQ / Celery)
  • Docker
Docs GitHub
Implementation notes
  • Reliable task scheduling and retry mechanisms.
  • Integration with Redis queueing or Celery workers.
  • Dockerized environment for easy deployment.
  • API for job monitoring and control.

Content Translation and Multilingual API (i18n backend)

i18n Backend API icon

Manages languages, translations, and delivers content via API.

  • Node.js
  • Express
  • MongoDB
  • i18n
Docs GitHub
Implementation notes
  • Dynamic language and translation management.
  • API endpoints for fetching localized content.
  • MongoDB schema optimized for multilingual data.
  • Integration with frontend localization frameworks.

Cloud File Storage and Management Service (File Upload & CDN integration)

Cloud File Storage Service icon

File upload, processing, and secure access management.

  • Node.js
  • Express
  • AWS S3
  • CDN
Docs GitHub
Implementation notes
  • Efficient file upload handling with streaming.
  • Integration with AWS S3 and CDN for fast content delivery.
  • Access control and security policies for files.
  • Scalable architecture to handle large files and traffic.

Logging and Monitoring API System

Logging and Monitoring API icon

For large projects requiring monitoring and alerting.

  • Node.js
  • Express
  • Elastic Stack
  • Prometheus
Docs GitHub
Implementation notes
  • Centralized log collection and storage using Elastic Stack.
  • Real-time monitoring and alerting via Prometheus.
  • Dashboard visualization for error trends and metrics.
  • API for querying logs and system health status.

User Analytics and Reporting API Backend

Analytics API icon

Collects input data and provides various statistics and reports.

  • Python
  • FastAPI
  • PostgreSQL
  • Data Visualization
Docs GitHub
Implementation notes
  • Efficient data ingestion and storage in PostgreSQL.
  • API endpoints for analytics queries and reports.
  • Visual dashboards for real-time statistics.
  • Secure access and performance optimization.