I'm a developer for Predator Software. I've developed software internally and for customers. From simple website lead processing code to custom development for satellite testing and code for fortune 50 customers.
In my professional career, I've programmed in more languages than I thought anyone would ever want. From the newest whiz-bang to the oldest cruft. Functional, imperative, object-oriented, dataflow, logic, even ladder logic. I've had to use them all. Linux, Windows, heck even ReactOS.
Some of the highlights:
...and a whole host of others, I've even had to develop interconnect code between multiple languages and code base generations.