Preface
My first job with Ruby on Rails was at LivingSocial in 2011, about two months before the biggest shopping day in the United States called "Black Friday." I was the brand new owner of our payments system, which was built on background jobs using Resque. I had never heard of Resque and never worked on a system that had background jobs. I had never worked on a system that charged people money.
The only other person that knew anything about this code got so sick at one point that the CTO had to call his wife to make sure he was still alive (he was). During that time, thousands of background jobs were failing. They sat in a queue with error messages no one understood. The CTO, VP of Engineering, and I sat in front of a computer together ...
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