If you've ever tried to automate a workflow only to get stuck wrestling with mismatched data formats, failed API calls, or logic that works sometimes but breaks in unpredictable ways — you already know the pain that n8n is built to solve. n8n is one of the most powerful open-source workflow automation platforms available today, and at the heart of every effective automation is a solid understanding of its core nodes and how data flows between them. This course takes you from the fundamentals of how n8n structures and passes data, all the way through the tools you need to filter, transform, merge, and manipulate that data with precision. You will learn how to use the Set node to shape your payloads, the IF and Switch nodes to build conditional logic, the Code node to write custom JavaScript transformations, and the Merge node to combine data streams from multiple sources. Each lesson focuses on one clear concept, building on the last so the skills compound naturally. By the end of this course, you will be able to design workflows that don't just run — they handle real-world messiness gracefully. Whether that means cleaning up inconsistent API responses, routing records based on dynamic conditions, or joining datasets from two different services into a single clean output, you will have the hands-on skills to make it happen. This course is a great fit for developers, no-code builders, and technical operations professionals who have used n8n at least a little and want to move beyond drag-and-drop basics into confident, production-ready automation. No prior data engineering background is required — just a willingness to get your hands on real workflows. Stop letting data transformation be the bottleneck in your automations. Enroll now and build the foundation that every serious n8n workflow depends on.