What programming languages have you used to write firmware?

"Early in my career, most of the firmware I wrote was either in C or basic assembly code. This was sufficient because the code was then assembled into machine code which the hardware would access during start-up. However, with the proliferation of firmware into a wider variety of devices and appliances, I am now writing code using higher-level languages such as JavaScript, C, Ruby, and Pearl. These are more efficient and enable me to create code specific to the device and its functions."