Ronny Elsner

🚀 Fullstack Developer & Test Automation Expert | 25 Years of Experience | PWA, HiL/SiL, n8n & Process Automation

Do you need a robust, scalable solution – fast, error-free, and maintainable?

As a Senior Software Developer with 25 years of experience in fullstack web development, test automation, and system integration, I help you implement projects in weeks instead of months – without compromising quality. My specialization: HiL/SiL, test automation, and process automation with n8n.

🔧 How I help you:

✅ Test Automation & HiL/SiL for Embedded Systems

→ Stable, maintainable test suites with Playwright, Robot Framework, TestComplete, or Squish – for web, desktop, and embedded.

→ HiL/SiL tests for control units, IoT devices, or industrial systems (e.g., with CAN, Modbus, OPC UA).

→ Example: Automated HiL tests for a control unit with 100% test coverage – reduces manual tests by 80%.

✅ Process Automation with n8n & Workflow Optimization

→ Automation of business processes (e.g., order processing, data migration, API integration).

→ Example: An n8n workflow for a client that eliminates manual data entry and reduces errors by 90%.

✅ Fullstack Development with AI Integration

→ Backend (Node.js, Python, SQL/NoSQL), Frontend (React, Vue.js), and databases – from architecture to deployment.

💡 What makes me special:

✔ 25 years of experience in software development & testing – from small startups to large enterprise systems.

✔ Fast implementation without compromising quality – I deliver stable solutions in weeks, not months.

✔ Deep understanding of test automation – from E2E tests (Playwright, Robot Framework) to HiL/SiL (CAN, Modbus).

✔ Process optimization with n8n – I automate repetitive tasks so you can focus on what matters.

✔ Practical experience with PWA & Kiosk systems – I know the challenges of offline functionality, touch interactions, and hardware integration.