1. Problem Statement

SAP customers needed a modern Stripe integration, but the legacy environment could not support multi-tenant onboarding, diverse payment methods, or high-volume, low-latency transactions. The old design mixed business logic, had no isolation between tenants, and lacked the security posture required for financial workloads.

The solution was built for Client Bristlecone (A Mahindra Group of Companies) for its SAP Customer

2. High-Level Solution

I architected a fully distributed Stripe Adapter that cleanly decouples SAP from Stripe using:

• API Gateway routing

• EventBridge for async, durable queues

• Granular microservices for tenant setup, payment configuration, execution, audit, and diagnostics

• Layered architecture for predictable scaling and clear separation of concerns

The platform allowed SAP customers to activate Stripe, configure providers, run payment flows, and receive reconciled audit data with minimal operational friction.

3. Technical Architecture Snapshot

Gateway & Routing Layer

• API Gateway validates API keys, signatures, and JWT.

• Routes requests to service-specific endpoints.

• Shields SAP from provider complexity.

Event-Driven Processing

• EventBridge queues absorb traffic spikes.

• Ensures near–zero data loss and smooth horizontal scaling.

• Async pipeline for payment intents, confirmations, refunds, and audit events.

Microservices Mesh

Each service follows single-responsibility:

• Tenant Service – onboarding + encrypted credential storage

• Settings Service – provider capabilities

• Payment Configuration – intent metadata, payment links

• Payment Service – high-availability execution

• Audit & Diagnostics – reconciliation, error capture

• Notification – system health alerts

All services deploy independently and scale based on load.

Layered Architecture

• Core Framework – logging, routing, service host, DB abstractions

• DB Layer – SQL for transactions; NoSQL for tenant metadata

• Business Layer – payment flows and provider logic

• Integration Layer – SAP adapter and gateway contract

This structure reduced coupling and made the platform upgrade-friendly.

Security Model

• WAF + Shield for edge protection

• JWT + API keys with role-based policies

• Encrypted storage for tenant secrets

• Full request/response tracing for audits

Designed to meet fintech-grade security expectations for enterprise workloads.

Performance Approach

• Atomic CRUD operations

• Batch endpoints for heavy workloads

• Async non-blocking provider calls

• Request correlation IDs for observability

Result: stable performance under high concurrent load.

4. Outcome

The adapter enabled SAP teams to integrate Stripe reliably without touching core SAP code. It delivered strong isolation, predictable performance, secure multi-tenant onboarding, and a clean pathway for adding new payment methods in the future.