Work: Palantir Technologies
My last summer internship while I was a CMU student was as a developer at Palantir Technologies. Palantir primarily makes software to deal with two industries: finance and government security. I worked on Palantir Finance, designing and implementing frontend features to the application's Swing GUI.
Palantir gave me exposure to many useful development practices such as code reviews, build systems, version control fluency, regression end-to-end and integration tests, the QA Testing cycle, one-on-one meetings, and even IDE plugins.