Okay, let’s tackle this. So Sergio has a broad range of skills, which is great. Software developers with his level of expertise, especially in Seattle, can charge around $100–$200 per hour. However, considering his skills in C++, iOS development, and web development, which are in demand, I’ll estimate around $125 per hour. This is slightly below the average for senior software developers in the US, but it’s still a competitive rate considering his location and skillset.