Okay, let’s tackle this. So Geoffery Gilles has a mix of programming languages and technologies under his belt, including C++, Java, and Node.js. His experience with iOS development is also notable. Location is Seattle, Washington, which is a hub for tech companies. Considering his skillset and location, I'd estimate his hourly rate to be around $120, which is on the lower end of the scale for a software developer in the US. This is because his skills are not overly specialized, and he lacks experience in areas like full-stack development or cloud computing. However, his experience with MongoDB and Node.js is valuable, and his iOS development skills are also in demand. To give you a better idea, here are some average hourly rates for software developers in the US: $100-$150 for junior developers, $150-$250 for mid-level developers, and $250-$400 for senior developers. So, my estimate of $120 is slightly below the mid-level range, but still reasonable considering his experience and skills.