UPDATE: Currently, I'm working as the Developer Relations Engineer @ Codemagic. Not available for freelancing technical writing.
I write about Swift language, Apple platforms developments, with a particular focus on the SwiftUI framework.
For a standard article (Example) of 1200-1500 words, the rate starts at USD 350.
For an article with a sample project (Example) of 1200-1500 words, the rate starts at USD 550.