Being a "Codejumper" was one of the most fun aspects of being a Field Application Engineer for an embedded OS company in Los Angeles
One day solving issues with the Mars Rovers at JPL another day working on the F35
One day I visited, Rocketdyne, Northrup, Lockheed, The Aerospace Company (with a quick tour of their space junk garden), and Panavision
Later, working as the product manager/head support guy for a safety critical embedded GUI company I "codejumped" into fixes for both the B2 and Orion Capsule avionics