I was lucky, each working experience I came across was in different computer disciplines.
At my first job, I was developing mobile applications for symbian devices, like the Nokia 3210, yes I am that old.

The next couple of companies I joined, had me doing front end development, UI design with CSS and HTML, later deep dive in Javascript, then I was heavily involved in backend development.
After that, I was roped into developing server architecture and security as well as optimising databases to squeeze the most out of performance and making sure it does not go down!
That’s why some of my friends call me a performance freak.

Now, I run my own company as its lead technical person, developing middleware for banks and government bodies.