Ransoming your infrastructure for fun and profit, semaphores versus mutexes, and interviews from the other side of the table.
hashicorp/vault
Ex-Goldman Sachs Programmer’s Twisting Case Has a Few Turns Left
Terry Childs
Technically Speaking, Technically Speaking - May 5, 2015
Pony
turing-incomplete GitHub Issue 115: Interviewing for technical aptitude and potential from Dylan Greene
Mutex vs. Semaphore