"Yes, it is very helpful to get a clear study path for my career change into software developer field. Ruben is very nice and patient to give me lots of valuable advices on how to become a junior backend developer based on my previous non-technical academic and work background. He complied a very useful file about the books I can read and the courses I need to take in order to master the necessary knowledge to become a backend developer. And his suggestion is very practical and contructive. I appreciate his help, and hope to meet him again to bring my specific questions on Java. "