Yii 2 FinTech Application
Secure Financial Management Platform — $10M+ in Transactions
Project Details
Project Overview
A Berlin FinTech startup needed a banking-grade platform for bank account aggregation, AI spending insights, and P2P payments. Their no-code MVP was unreliable, non-PSD2-compliant, and crashed above 500 users. Data was corrupted twice in three months.
XCodeSol rebuilt the platform on Yii 2 with React frontend: AES-256-GCM encryption, HSM-backed key management via AWS KMS, JWT rotation, rate limiting, and immutable audit logging. Open banking via Plaid connects 2,000+ European banks in under 60 seconds with AI categorization at 94% accuracy. P2P engine built on Stripe Connect with 14-signal fraud detection and 3D Secure 2.0.
Third-party security audit passed with zero critical findings. Full PSD2 compliance certified. Processed $10M+ in 6 months. Client secured $4.2M Series A at 3× valuation.
Key Features
Banking-Grade Security
- •AES-256-GCM encryption for all sensitive data at rest
- •Multi-factor auth: password + biometric + device fingerprint
- •Immutable audit logging on append-only DB schema
Open Banking via Plaid API
- •Connects to 2,000+ European banks in <60 seconds
- •Real-time transaction aggregation across all accounts
- •AI categorization engine achieving 94% accuracy
P2P Payment Engine
- •Instant transfers via Stripe Connect
- •3D Secure 2.0 with SCA-compliant biometric fallback
- •14-signal fraud detection pipeline on every transaction
AI-Powered Insights
- •Auto-categorization trained on 100K+ transactions
- •Budget forecasting based on 3-month rolling averages
- •Subscription detection with renewal alerts
PSD2 Compliance & Security Audit
- •Full PSD2 compliance certification achieved
- •Third-party security audit: zero critical findings
- •Automated settlement reconciliation: zero discrepancies
Results at a Glance
| Uptime | 99.99% (up from 91%) |
| Transaction Volume | $10M+ processed (6 months) |
| User Capacity | 100× (500 → 50,000+) |
| Bank Connection Success | 98.7% |
| Transaction Categorization | 94% accuracy |
| P2P Transfer Time | <3 seconds |
| Security Audit | Zero critical/high findings |
“Building a secure banking app requires precision. XCodeSol delivered a robust, PSD2-compliant platform. $10M+ in transactions with zero security incidents since launch.”
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