Fintech Payment Gateway

A secure, high-performance payment processing platform built from the ground up to handle enterprise-scale transaction volumes while maintaining the strictest security standards.

The Challenge

A fintech startup needed a payment gateway that could:

• Process high volumes - Handle 1000+ transactions per second
• Meet compliance requirements - PCI-DSS Level 1 certification
• Prevent fraud - Real-time fraud detection and prevention
• Support multiple methods - Cards, ACH, and cryptocurrency

Off-the-shelf solutions couldn't provide the customization and control they needed.

Our Approach

We built a payment platform from scratch, prioritizing security and scalability from day one.

Security-First Architecture

1. Tokenization - No raw card data stored in our systems
2. Encryption - End-to-end encryption for all data
3. Isolation - Cardholder data environment fully isolated
4. Audit Trail - Complete logging of all operations

The Solution

Payment Processing Engine

• Real-time transaction processing with sub-second latency
• Automatic retry logic with exponential backoff
• Multi-acquirer routing for optimal success rates
• Intelligent decline recovery

Fraud Detection System

• Machine learning models trained on transaction patterns
• Real-time risk scoring for every transaction
• Velocity checks and behavioral analysis
• Manual review queue for edge cases

Merchant Dashboard

• Real-time transaction monitoring
• Settlement and reconciliation tools
• Chargeback management
• Analytics and reporting

Developer API

• RESTful API with comprehensive documentation
• SDKs for major programming languages
• Webhook notifications for events
• Sandbox environment for testing

Technology Stack

Results & Impact

The platform exceeded all performance targets:

• $10M+ monthly transaction volume processed
• PCI-DSS Level 1 compliance certified
• 0.1% fraud rate (industry average: 1.5%)
• 99.99% uptime maintained consistently

Compliance Journey

Achieving PCI-DSS Level 1 compliance required:

• Quarterly external network scans
• Annual on-site audits
• Penetration testing
• Security awareness training
• Documented policies and procedures

Client Testimonial

"G1 Technologies built us a payment platform that rivals what major financial institutions have. The fraud detection alone has saved us hundreds of thousands in chargebacks."

— CEO, Fintech Startup

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Building a fintech product? Contact us to discuss secure payment solutions.