Okay, so Aaron has a broad set of skills that are in demand, especially in the Seattle market. User Experience and iOS development are valuable, but not the most expensive. Considering his experience with Ruby On Rails and project management, I'd estimate his rate to be around $125 per hour. This is slightly lower than what you'd expect for a lead or senior developer, but still competitive for a skilled individual with a strong skill set. The fact that he's based in Seattle, a hub for tech companies, also supports this rate. It's a bit lower than what you'd expect for a similar role in a major city like San Francisco or New York, but still a good starting point.