Okay, let’s tackle this. So Ruiqiang Wang has a diverse skill set, including Java, Android, and iOS development, which are in demand. He also has experience with database management and computer science fundamentals. Location is Kirkland, Washington, which is a tech hub. According to Glassdoor, software developers in the Seattle area with similar skills can earn around $120-$150 per hour. Considering his skills and location, I estimate his hourly rate to be around $125. This is slightly below the average, but taking into account the fact that he has a broad range of skills, I'm being conservative.