Here's the thing: working hard doesn't just benefit your employer. It also benefits you because you'll learn new skills rapidly.
If your employer doesn't recognize the value you're adding, don't just sit around hoping for a raise someday. Use your new skills to find one who will. At least in my experience (as an engineer in the US), this is relatively easy and is considered a normal thing to do in one's career.
If your employer doesn't recognize the value you're adding, don't just sit around hoping for a raise someday. Use your new skills to find one who will. At least in my experience (as an engineer in the US), this is relatively easy and is considered a normal thing to do in one's career.