Android developer (Kotlin/Java) and some Flutter (newbie). Did iOS (Swift) for a while, not really up to date with the latest Swift.
I haven't done Objective-C since before ARC. I haven't done C#.NET since .NET 3.5 in 2011.
I occasionally use Windows for gaming. I mainly use Linux for everything else.
I do software development at HyperGiant (formerly BlackPixel), jumping from customer to customer and from iOS to Android in the blink of an eye.
Never offer me a job that involves me getting up and going to an office every day, I've been successfully working from home since 2001 and I expect to continue to do so. Coming to an office every now and then or once a week is fine.