I am a B.Tech graduate in Computer Science and Engineering with hands-on experience as a DevOps engineer. I am certified as an AWS Solutions Architect and also hold a Terraform certification. I specialize in cloud infrastructure, automation, and deployment. My skill set includes managing scalable applications on AWS/Azure and optimizing DevOps processes, security, and monitoring. I am currently working as a DevOps Engineer at ToolJet.
A production-grade invoice management app built for Indian freelancers & small businesses.
GST-compliant invoicing • PDF generation • Cloud backup • Subscription billing
Generate professional GST invoices, track payments, manage clients — all from your phone. Built with a dark, modern UI and optimized for real-world freelancer workflows.
| Feature | Details |
|---|---|
| 🧾 Smart Invoicing | Auto-numbered invoices with GST (CGST/SGST/IGST), discounts & multi-currency (₹ / $) |
| 📄 PDF Templates | 3 professionally designed templates — Minimal, Modern & Classic |
| 🔁 Recurring Invoices | Weekly, monthly, quarterly & yearly auto-generation |
| 💰 Payment Tracking | Partial payments, balance due, auto status updates (Draft → Sent → Paid) |
| ☁️ Google Drive Backup | One-tap cloud backup & restore with Google Sign-In |
| 📊 Dashboard Analytics | Revenue insights with all-time / monthly toggle, overdue tracking |
| 📱 UPI QR Codes | Auto-generated UPI payment QR on invoices for instant payments |
| 🔗 WhatsApp Sharing | Share invoices directly via WhatsApp with one tap |
| 💎 In-App Subscriptions | Freemium model with Google Play Billing (INR & USD pricing) |
Frontend Flutter 3.x + Dart • Custom dark theme • flutter_animate Database SQLite (sqflite) • SharedPreferences Cloud Google Sign-In • Google Drive API (googleapis) Billing in_app_purchase (Google Play Billing) PDF Engine pdf + printing packages • Custom painters Architecture Singleton services • Clean separation of concerns
- Singleton service layer —
DatabaseService,BackupService,SubscriptionService,ProfileService - WAL-safe backup — SQLite WAL checkpoint before cloud backup to prevent data loss
- Resilient restore — Full DB + SharedPreferences restore with automatic invoice count sync
- Reactive IAP — Purchase stream with
Completerpattern for reliable subscription activation - Smart navigation — Post-restore routing based on actual data state, not stale flags
Made with ❤️ in India