NASA JPL Internship
The summers after my junior and senior years of high school (2012 and 2013), I interned at NASA's Jet Propulsion Laboratory writing data analysis software for the Deep Space Network to help improve and understand their antenna systems. I mostly used the Processing language to make Java programs as well as Xcode to make Mac programs.
The Deep Space Network manages the hardware and software at three locations of antennas across the world. This network is the communications link between Earth and deep spacecrafts, including the Mars rovers, landers, and satellites, the Cassini spacecraft, and the Voyager spacecraft.