# Connect the systems your business depends on.

> I design and build reliable integrations between commerce platforms, ERP, CRM, PIM, payment, logistics, marketplaces, and internal tools. The goal is not merely to connect two APIs, but to make data flow traceable, recoverable, and maintainable in daily operations.

Provider: Hung Mac — Senior Full-Stack Developer and Technical Consultant, former Shopware Core developer, relocating to Germany in October 2026.

## Best for

- Disconnected systems and manual data transfer
- Unreliable or undocumented third-party integrations
- Middleware that needs clearer ownership, monitoring, or recovery paths
- Teams planning a new API-led workflow or platform migration

## Deliverables

- Integration architecture and data-flow map
- APIs, webhooks, queues, scheduled jobs, and transformation logic
- Logging, retries, idempotency, and operational documentation
- Testing, deployment guidance, and handover

## Process

1. Map systems, business rules, data ownership, and failure scenarios
2. Define the smallest reliable architecture and delivery milestones
3. Implement and test critical flows with realistic data
4. Release with monitoring, recovery steps, and clear documentation

## FAQ

### Which systems can you integrate?

I work with documented APIs, webhooks, queues, file exchanges, and databases across commerce, ERP, CRM, PIM, payment, logistics, marketplaces, and internal tools. A short discovery step confirms feasibility and access.

## Official links

- [Canonical HTML page](https://hungmac.com/en/services/system-integration-middleware)
- [All services](https://hungmac.com/en/services.md)
- [Contact Hung Mac](https://hungmac.com/en/contact)
- [Shopware Core contributions](https://hungmac.com/en/shopware-core-contributions)