My first dev job was for a .net shop. Until then, I had only worked in Java and PHP. This place didn't have the normal team structure, and I soon found that I was going to be working solo on the projects I was responsible for. I'm my first week there, I was tasked with making make revisions to an application in a new language, with a new toolkit, solo. A few weeks later was the most intense day I've had as a dev, as I put in the change control to release my update to production.