Started working on mobile apps right after school, got sucked in by iOS and stuck by it ever since. I strongly prefer swift to any other language (with exception of C and Python - they are better for many use cases..). During my career in mobile development, I also switched it up a bit and done some work in Java for android even though I can't say I liked the platform very much from developer point of view. Started in corporate, now I work in a small company of few people with more responsibilities, developing iOS apps for clients from various fields.
As luck would have it, a help was needed in one of our back-end projects, so I learned php and worked full-time to finish project in deadline. Even though it was fun learning new stuff, I still very much prefer cozy mobile apps. Perhaps gonna try BE in python, not really decided yet.