Okay, let’s break it down. Demi has a solid skill set with expertise in C++, IoS development, software development, Linux, and more. Her education from the University of Washington is a plus. However, her location in Seattle, WA, might limit her earning potential compared to other major tech hubs. Considering her skills and experience, I estimate her hourly rate to be around $125, which is slightly below the national average for software developers in the US. This rate is also lower than what developers with similar skills in San Francisco or New York might charge. Nevertheless, Demi's skills and experience make her a competitive candidate in the Seattle market.