How to Build a B2B Payment Platform – Complete Technical Architecture Guide

The Architecture of a Modern B2B Payment Platform

Building a B2B payment platform that handles millions of transactions daily requires careful architectural decisions. This technical guide covers the complete stack — from frontend to infrastructure — based on Laraware’s production-proven architecture serving thousands of businesses.

4-Layer Architecture

Layer 1: Presentation Layer

• Web Application: Laravel 11 + Vue.js 3 + TypeScript — server-side rendering for SEO, reactive UI for real-time updates

• Mobile Application: Flutter + Kotlin Native — single codebase for iOS and Android with native performance

• API Gateway: REST + GraphQL + WebSocket — multiple protocols for different use cases

• Admin Dashboard: React 18 + Material-UI — fast, responsive admin experience

Layer 2: Intelligence Layer (AI/ML)

• AI/ML Engine: TensorFlow + PyTorch — fraud detection, commission optimization, predictions

• Analytics: Apache Spark + ClickHouse — real-time data processing and analytics

• NLP: BERT + GPT Integration — chatbot, document processing, sentiment analysis

• Computer Vision: OpenCV + Custom Models — KYC document verification, face matching

Layer 3: Data Management

• Primary Database: MySQL 8.0 Cluster — ACID-compliant transactions

• Cache Layer: Redis Sentinel — session management, rate limiting, hot data

• Search Engine: Elasticsearch — transaction search, log analysis, full-text search

Layer 4: Infrastructure

• Cloud: Multi-Cloud (AWS + Azure + GCP) — no single point of failure

• Containerization: Docker + Kubernetes — auto-scaling, self-healing

• CDN: CloudFlare Enterprise — global content delivery, DDoS protection

• Monitoring: Prometheus + Grafana — real-time system health monitoring

Security Framework

• Application Security: JWT authentication, OAuth 2.0, API rate limiting, CSRF/XSS protection

• Data Security: AES-256 encryption, E2E encryption, database encryption, data masking

• Infrastructure Security: WAF, DDoS mitigation, network segmentation, intrusion detection

• Compliance: PCI-DSS, RBI guidelines, PML Act, GDPR-ready

Or Simply Use Laraware

Building this architecture from scratch requires 15-30 developers, 18-24 months, and ₹2-5 crore investment. Laraware offers this entire stack ready-made — with 48 Modules, 580+ APIs, and complete source code — starting at ₹5 lakh.