Interesting language, surprisingly similar to Kotlin, with nice advanced features. Used to develop iOS apps.
Swift! At least better than objective-c
I quit my previous job because I needed some time to discover new technologies and try to develop some ideas. I saved money so I could be a few months only working on these projects. None of them was a big success though, but I learnt a lot in the process. I was so focused that I used to work for around 12 hours a day, 6-7 days a week (I was often top 5 in WakaTime). After all, I was working for myself, and a third party... and I was young, I guess.