I have written a ton of software over the years, some of it was pretty awesome, and some of it was not-so-awesome. Most of my experience is with desktop and mobile application development, including a fair amount of low-level stuff.
While a lot of my early work as in-house development for various telecommunications and defense organizations, I've also written a fair amount of commercial software; including apps for iOS, Android, Windows, Mac, and Linux. I've also written a lot of research-oriented software that were heavily data-driven. These were mostly web-based applications that were heavily data-driven, using MySQL, Mongo, and Neo4J.