What do you by "Mobile skills"? Like writing Android or iOS apps using Java/Kotlin/Swift, or do you mostly write C++ for those devices?

I mostly write C++ services/libraries for Android, but I've wondered if learning the app dev side of things is worth it. I'm sort of concerned that mobile app dev pays less than system level C++ work.

I needed to hear something like this. I'm 61, got laid off last April and haven't had an interview since June. I have a long history in PHP and Perl, half a decade on Golang, Vue, React and devops. I was beginning to think that ageism was playing against me. Now I know I need to dig deeper.. thanks.