SusuFlex - Technical Due Diligence

📱 Technology Stack

Layer	Technology	Status	Notes
Frontend	Flutter/Dart	✅ Production	Single codebase for iOS, Android, Web
Backend	Firebase (Firestore, Auth, Storage)	✅ Production	Serverless, auto-scaling
Payments	Stripe Connect	✅ Integrated	PCI-DSS compliant
Notifications	Firebase Cloud Messaging	✅ Integrated	Push notifications across platforms
Analytics	Firebase Analytics + Custom	✅ Integrated	User behavior tracking
CI/CD	GitHub Actions	✅ Configured	Automated testing & deployment

📊 Codebase Metrics

50K+

Lines of Code

80+

Screens

150+

Dart Files

Additional metrics:

100+ Custom Widgets
25+ Services
30+ Data Models

🏗️ Architecture

┌─────────────────────────┐
│     Presentation        │
│ (Screens, Widgets, UI)  │
├─────────────────────────┤
│    Business Logic       │
│ (Services, Providers)   │
├─────────────────────────┤
│        Data             │
│ (Repositories, APIs)    │
├─────────────────────────┤
│       Domain            │
│   (Models, Entities)    │
└─────────────────────────┘
            

🔒 Security Implementation

Authentication

Firebase Auth (email, social)
Biometric support (Face ID, Fingerprint)
Session management & token refresh
Rate limiting on auth attempts

Data Protection

End-to-end encryption for sensitive data
Firestore security rules (row-level access)
HTTPS-only communication
PCI-compliant payment handling (via Stripe)

✅ Code Quality

Practice	Status	Details
Static Analysis	✅	Dart analyzer in strict mode
Linting	✅	Custom lint rules enforced
Unit Tests	✅	Core business logic covered
Widget Tests	✅	UI component testing
Integration Tests	⚠️	Key flows covered, expanding
Documentation	✅	API docs, README, guides

☁️ Infrastructure & Scalability

Firebase Services (Auto-scaling)

Firestore: NoSQL, handles millions of reads/writes
Cloud Functions: Serverless compute
Firebase Hosting: Global CDN
Cloud Storage: Media & document storage

Cost Structure (Estimated)

Users	Monthly Cost
0-1,000	$0 (free tier)
1,000-10,000	$50-200
10,000-100,000	$200-2,000

🔌 Third-Party Integrations

Stripe Connect Firebase Suite Google Sign-In Apple Sign-In Exchange Rate APIs FCM (Push)

🛡️ Compliance Readiness

✅ GDPR data handling patterns
✅ Privacy policy & terms of service
✅ User consent management

✅ Data export capability
✅ Account deletion support
⚠️ SOC 2 (via Firebase - Google certified)

Technical Questions?
📧 tech@susuflex.com | 🌐 susuflex.com/investors