The biggest step in becoming a backend developer is learning the basics: coding fundamentals, programming languages, and frameworks.
You should learn basic Backend development, best practices, and tools. You need to know different languages like C, C++, Java, Python, PHP and must have a basic understanding of algorithms and flowcharts.
You should learn to code with the mindset of the business you’re building. You will be working closely I’m sure with product owners, customer support, and other teams within your organization. Learn how to think like them and solve their problems.