CreditUnion Core Banking Platform

Enterprise-grade microservices banking platform serving 4.2M+ members across North America.

Architecture Overview

┌─────────────────┐     ┌──────────────────┐     ┌─────────────────┐
│   Web Portal    │────▶│   API Gateway    │────▶│  Auth Service   │
└─────────────────┘     └──────────────────┘     └─────────────────┘
                               │                           │
                               ├───────────────────────────┤
                               ▼                           ▼
                    ┌──────────────────┐       ┌─────────────────┐
                    │ Transaction Svc  │       │  Account Service│
                    └──────────────────┘       └─────────────────┘
                               │                           │
                               └───────────┬───────────────┘
                                           ▼
                                ┌─────────────────────┐
                                │  Compliance Engine  │
                                └─────────────────────┘

Services

• auth-service: OAuth 2.0/OIDC authentication & authorization
• transaction-service: Real-time transaction processing (ACH, Wire, RTP)
• account-service: Account management & customer profiles
• compliance-service: KYC/AML monitoring & regulatory reporting

Tech Stack

• Backend: Node.js 20.x, Java 21, Python 3.12
• Frontend: React 18, TypeScript 5.3
• Data: PostgreSQL 16, Redis 7, Kafka 3.6
• Infrastructure: Kubernetes 1.29, Docker, Terraform
• Observability: Datadog, PagerDuty, ELK Stack

Getting Started

Prerequisites

• Docker Desktop 4.x
• Node.js 20+ / npm 10+
• kubectl & helm
• AWS CLI configured

Quick Start

# Clone repository
git clone https://github.com/creditunion/core-banking.git

# Start all services
docker-compose up -d

# Run migrations
npm run migrate:up

# Access web portal
open http://localhost:3000

Development

Branch Strategy

• main - Production releases
• develop - Integration branch
• feature/* - Feature branches
• hotfix/* - Production hotfixes
• release/* - Release candidates

Commit Convention

We follow Conventional Commits:

feat: add wire transfer approval workflow
fix: resolve race condition in transaction posting
docs: update API authentication guide

Compliance & Security

• SOC 2 Type II Certified
• PCI DSS Level 1 Compliant
• GLBA Compliant
• FFIEC Cybersecurity Guidelines

Documentation

• API Documentation
• Architecture Decision Records
• Runbooks
• Security Guidelines

Support

• Internal Wiki: https://wiki.creditunion.internal
• Slack: #platform-engineering
• PagerDuty: banking-platform-team

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Last Updated: February 2026 | Maintained by: Platform Engineering Team