Hung Mac
DE Discuss a project
Services Shopware About Selected work Writing Discuss a project
Services System Integration & Middleware

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.

APIs & webhooks ERP / CRM / PIM Queues & data flows Observability
Discuss an integration
01 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
02 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
03 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
01

Integration work that survives real operations.

Business integrations fail at the edges: duplicate events, partial updates, timeouts, inconsistent identifiers, and unclear ownership. I build those realities into the design from the start.

My commerce background is especially useful where orders, customers, inventory, pricing, payments, and fulfilment cross system boundaries.

Hung Mac · Senior Full-Stack Developer and Technical Consultant
Hung Mac Senior Full-Stack Developer · Germany from October 2026
Senior Full-Stack Developer · Former Shopware Core team member

Hi, I’m Hung Mac.

I’m a senior full-stack developer and technical consultant with more than ten years of software experience. I work across integrations, automation and AI, backend systems, and e-commerce. I previously worked as a developer on Shopware’s Core team and will relocate to Germany in October 2026.

  • Former member of Shopware’s Core team with public core contributions
  • 6+ years of Shopware and 10+ years of PHP experience
  • Shopware 6 Advanced Developer, Solutions Specialist, PaaS Specialist, and Frontend Developer certifications
  • Integrations, backend systems, automation, AI-assisted workflows, and e-commerce
View Shopware core contributions More about me
FAQ

System Integration & Middleware

Reliable API integrations, middleware, data flows, and business-system connections designed and delivered by senior full-stack developer Hung Mac.

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.

Services
Automation & AI Integration Backend & Full-Stack Development E-Commerce Platforms Shopware Freelancer Shopware Developer Shopware Audit Shopware 6.7 Updates Shopware Debugging Shopware Maintenance Shopware Performance Optimization Plugin & App Development Server, Hosting & Deployment Support