Overview:
NodeChat is a full-stack real-time chat application built from scratch as part of a Node.js crash course. It demonstrates core backend concepts including REST APIs, WebSocket communication, JWT authentication, and Google OAuth — all served from a single Express server with a vanilla JS frontend.

Core Features:

• Authentication: Email/password registration and login with JWT, plus Google OAuth via Passport.js.
• Rooms: Create public or private rooms, browse and join public rooms, invite users to private rooms.
• Direct Messages: Find users by email and start private one-on-one conversations.
• Real-time Messaging: Instant message delivery using Socket.IO with room-based broadcasting and online user tracking.
• Message History: Persistent chat history loaded from MongoDB on room or DM open.

Technical Implementation:

• Backend: Node.js + Express with a domain-driven folder structure (auth, messages, rooms, users)
• Real-time: Socket.IO with JWT middleware on the handshake for authenticated connections
• Database: MongoDB via Mongoose with User, Message, and Room models
• Auth: JWT tokens + bcrypt password hashing + Passport.js Google OAuth 2.0
• Frontend: Vanilla HTML, CSS, and JavaScript — no framework required
• Deployment: Single-repo deployment on Render with MongoDB Atlas

What I learned:
Building NodeChat covered the full backend development lifecycle — from designing a REST API and real-time socket events, to handling authentication flows, database modeling, and deploying a live production app.

Overview:
SabaiJob is a mobile platform for Myanmar immigrant workers, connecting them with verified blue-collar job opportunities. The app aims to be easy to use, secure, and tailored to job preferences, while fostering connections with employers, NGOs, and the community. I contributed to the mobile app UI and API integration, ensuring a smooth and responsive experience for users.

Key Features:

• Job Seekers: Browse secure and verified job posts tailored to your preferences.
• Employers & NGOs: Connect with the workforce and contribute to the community.
• Notifications & Updates: Stay informed on application status and opportunities
• Freemium & Premium Features: Access to daily limited job posts or unlimited job posts.
• User-Friendly Design: Intuitive interface for easy navigation.

Technical Implementation:

• Mobile App (Flutter): UI development and API integration

Project Impact:
Successfully launched on Google Play Store with active user base. The platform has facilitated numerous job placements and received positive feedback for its user-friendly interface.

Overview:
The Ultimate Tic Tac Toe project is an enhanced version of the traditional game, expanding it into 9 big grids with 9 small grids each (total of 81 cells). It introduces player accounts with sign-up and log-in, while delivering a more complex and strategic experience compared to the classic version.

Key Features:

• Player Accounts: Players can sign up (generating a unique ID) or log in with their existing ID.
• Game Mechanics: Classic X vs O gameplay, but expanded to 9×9 nested grids for deeper strategy.
• Victory Conditions: Winners are determined by capturing large grids through diagonal, vertical, or horizontal alignments. If no clear winner emerges, the player with more large grids wins; ties are also supported.
• Deployment: Hosted on Google Cloud for online play

Technical Implementation:

• Backend: Java Spring Boot (MVC architecture)
• Frontend (View): HTML, CSS, JavaScript
• Deployment: Google Cloud Run

Overview:
The Hospital Management System is a full-stack platform that integrates AI-driven healthcare recommendations with modern mobile and web interfaces. It enables patients, doctors, and administrators to collaborate seamlessly, ensuring efficient healthcare workflows supported by AI and doctor validation.

Core Features:

• Patient Mobile App: View lab data with doctor-approved recommendations and manage appointments.
• Admin Dashboard: Upload patient lab data (manual or bulk), manage doctors, departments, and appointments.
• Doctor Dashboard: Review lab results with AI-generated recommendations, refine or override them, and approve final recommendations for patients.

Technical Implementation:

• Backend: Node.js (API services) + Python (rule-based algorithm)
• AI: Google Gemini (processes lab results and generates recommendations)
• Mobile App: Flutter (Clean Architecture + BLoC for state management)
• Web Frontend: ReactJS (Admin & Doctor dashboards)
• Database: PostgreSQL (hosted on Render)

Project Impact:
Developed as part of a team project, this system demonstrates the application of technology in healthcare to improve patient care and operational efficiency. The AI recommendation system achieved 85% accuracy in preliminary testing.

Overview:
The Restaurant App is a mobile restaurant management system developed as a second-year Mobile Application Project. It streamlines operations across three key roles — Waiter, Chef (Kitchen), and Cashier — improving coordination and efficiency with real-time updates.

Key Features:

• Chef (Kitchen): View incoming orders, update status (e.g., In Progress, Ready to Serve), and notify waiters when food is prepared.
• Waiter: Take customer orders, track order status, and receive notifications when dishes are ready.
• Cashier: Manage orders, handle billing & checkout, and oversee customer reservations.

Technical Features:

• Frontend (Mobile): Flutter (cross-platform development)
• Backend Services: Firebase (Authentication, Firestore Database)

Overview:
The Smart Campus Mobile App enhances the student experience by centralizing essential university services. From schedules to navigation and document requests, it makes campus life more convenient and connected.

Key Features:

• Class Schedules: View personalized timetables and stay updated on upcoming classes.
• Interactive Campus Map: Easily navigate campus landmarks such as buildings, dormitories, cafeterias, and facilities.
• Document Requests: Submit official requests for transcripts, certificates, and more directly in the app.
• AI Chatbot: Gemini-powered chatbot that provides instant answers to student inquiries.

Technical Implementation:

• Mobile Development: Flutter framework for consistent cross-platform experience
• Backend (CMS): Strapi
• Database & Authentication Firebase Firestore
• Maps Integration: Custom indoor mapping solution with GPS coordination

Overview:
A backend API for a SaaS-based task management platform designed for companies and teams. Organizations can register, manage team members, and subscribe to Free or Premium plans. Billing is handled through Stripe with a webhook-driven architecture for reliable payment processing.

Key Features:

• Multi-Tenant Architecture: Company-based system with isolated workspaces per organization.
• Role-Based Access Control: Owner and Member roles with granular project-level permissions.
• Stripe Subscription Billing: Free and Premium plans via Stripe Checkout with Laravel Cashier.
• Webhook-Driven Payment Sync: Handles subscription lifecycle events asynchronously — created, paid, cancelled.
• Secure Invitation System: URL-signed invitation links for safe team onboarding.
• Database Transactions: Atomic registration flow ensuring data consistency across company, user, and subscription creation.

Technical Implementation:

• Backend: Laravel 11 with layered architecture — Controllers, Services, Models, Webhooks
• Auth: JWT authentication with custom middleware for subscription and permission checks
• Billing: Stripe Checkout sessions with metadata tracking, webhook signature verification
• Database: Relational MySQL schema covering identity, tenancy, work management, and billing tables
• Email: Mailtrap integration for invitation and notification emails

Subscription States:
Free Plan activates immediately. Premium Plan stays pending until Stripe confirms payment via webhook, then transitions to active.