GharerElectro POS (Android • Java)
Offline + Firebase SyncA production-grade POS with billing, cart, stock updates, sales history, purchase history, and a clean invoice PDF/print flow with dialog-based preview.
I develop Android apps in Java — POS & Inventory, School Management, NFC/QR Attendance, Firebase (Realtime/Firestore), SQLite offline-first architecture, clean UI/UX, and maintainable codebases. My focus: production-ready features + future-proof data structure.
Your portfolio should highlight impact. These are presented in a recruiter-friendly, outcome-focused way.
A production-grade POS with billing, cart, stock updates, sales history, purchase history, and a clean invoice PDF/print flow with dialog-based preview.
Student/Teacher/Staff management, attendance automation, fees & transactions, exam & grading, parent notifications (SMS/Email), and audit-friendly logs — designed to scale.
Gate/point-wise attendance capture with NFC + QR, buzzer/LED feedback, and ethernet/PoE connectivity for scalable deployment beyond USB limitations.
A friendly quiz app focused on general knowledge and Bengali culture with daily challenges, rankings, rewards, motivational quotes, and push notification roadmap.
A practical, real-project skill set focused on shipping maintainable apps.
Java • Android SDK • Activities/Fragments • RecyclerView • ViewModel (MVVM) • Offline-first patterns • Clean dialog flows • Invoice PDF export/print UX
Firebase Realtime Database / Firestore • Structured nodes (purchaseItems, salesItems) • SQLite schema design • MySQL backend planning • Notification logs (SMS/Email APIs)
Future-proof architecture • Scalable data models • Role-based planning • Real workflow mapping (POS checkout, school gate attendance) • Maintainable code
ESP32 basics • OLED integration • RFID/NFC concepts • PoE deployment idea • PCB planning mindset
I plan carefully, build cleanly, and ship features that work in the real world.
I start by understanding the workflow, then design the data structure, then finalize UI flow, and finally implement. The goal: fewer bugs, clear code, and easy future updates.
Apps that genuinely help people — POS, inventory, school automation, attendance + notifications. My long-term vision is to build real-world products combining apps + IoT devices.
Let’s talk — I reply quickly and start with a clear plan.
If you have a project or job opportunity, send a message. I respond quickly and start with a clear plan.
Name: Zubayd Hossain
Role: Android (Java) Developer
Focus: POS, Inventory, School Management, NFC/QR Attendance
Stack: Java, Firebase, SQLite, MySQL planning
Location: Bangladesh (GMT+6)
Email: jubayd32@gmail.com