So how do find a good software developer without paying a lot of salary for trial and error? The real good ones are rarely available, there are many more who wi

So how do find a good software developer without paying a lot of salary for trial and error? The real good ones are rarely available, there are many more who will create a buggy mess. And now imagine, that you don't understand anything about software development yourself. So what you are asking for is simply impossible, there is no silver bullet.