I answered a mass email from a recruiter about the opportunity. In the last 6-7 years I have done a fair amount of prediction and data mining work that had to be coupled with combinatorial optimization. The opportunity at RaceTrac was presented as something among those lines but with a focus on the optimization problem. I find their optimization problem to be very interesting! I was interviewed twice over the phone. The first interview was a preliminary screening. The second interview was technical and it was mostly about assessing my experience with optimization. After that I interviewed in person at RaceTrac's headquarters. The whole interview process and travel experience was great and organized really smoothly and swiftly!