Hello. I've been doing trading for a long time. I guess it is more than 10 years already. I have a broker's license and I have a medium-sized community of followers. It is time to get my own trading software. Please share some guides/articles that cover this subject.

That's a perfect experience and set of skills to manage a project like this. But you should hire professionals for the software development and general drawing up of the architecture. And that's a normal thing, outsourcing the tasks to the professional is a recipe for success. But you have to do at least a draft of the technical assignment. Here, check this article on trading system development cost