I often get emails from students asking me how to get started in a career in embedded software. I have to assume that they think that this is a path to a well paid job and a corresponding glamorous lifestyle. I would hate to disillusion someone who is just setting out on life. I guess that I had great expectations too.
I am never able to give detailed advice on what to do and just comment that embedded software engineers actually come in several flavors. At one extreme, they are engineers with a deep knowledge of hardware and only do a bit of software when necessary; such skills are ideal for developing drivers and other low level code. At the other extreme, there are programmers who have no idea about embedded systems, but are focused on the application domain; there skill set is not very different from a software engineer working on applications for Windows or Linux. And, in the middle, are guys who understand real time behavior and real time operating systems.